Precalculus Examples

$4 x + 4 y + 3 z = 6$ , $4 x + 7 y + 5 z = 5$ , $5 x + 3 y + 3 z = 7$

Step 1

Solve for $x$ in $4 x + 4 y + 3 z = 6$ .

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Step 1.1

Move all terms not containing $x$ to the right side of the equation.

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Step 1.1.1

Subtract $4 y$ from both sides of the equation.

$4 x + 3 z = 6 - 4 y$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.1.2

Subtract $3 z$ from both sides of the equation.

$4 x = 6 - 4 y - 3 z$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$4 x = 6 - 4 y - 3 z$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2

Divide each term in $4 x = 6 - 4 y - 3 z$ by $4$ and simplify.

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Step 1.2.1

Divide each term in $4 x = 6 - 4 y - 3 z$ by $4$ .

$\frac{4 x}{4} = \frac{6}{4} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.2

Simplify the left side.

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Step 1.2.2.1

Cancel the common factor of $4$ .

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Step 1.2.2.1.1

Cancel the common factor.

$\frac{4 x}{4} = \frac{6}{4} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{6}{4} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{6}{4} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{6}{4} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3

Simplify the right side.

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Step 1.2.3.1

Simplify each term.

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Step 1.2.3.1.1

Cancel the common factor of $6$ and $4$ .

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Step 1.2.3.1.1.1

Factor $2$ out of $6$ .

$x = \frac{2 (3)}{4} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.1.2

Cancel the common factors.

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Step 1.2.3.1.1.2.1

Factor $2$ out of $4$ .

$x = \frac{2 \cdot 3}{2 \cdot 2} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.1.2.2

Cancel the common factor.

$x = \frac{2 \cdot 3}{2 \cdot 2} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.1.2.3

Rewrite the expression.

$x = \frac{3}{2} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} + \frac{- 4 y}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.2

Cancel the common factor of $- 4$ and $4$ .

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Step 1.2.3.1.2.1

Factor $4$ out of $- 4 y$ .

$x = \frac{3}{2} + \frac{4 (- y)}{4} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.2.2

Cancel the common factors.

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Step 1.2.3.1.2.2.1

Factor $4$ out of $4$ .

$x = \frac{3}{2} + \frac{4 (- y)}{4 (1)} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.2.2.2

Cancel the common factor.

$x = \frac{3}{2} + \frac{4 (- y)}{4 \cdot 1} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.2.2.3

Rewrite the expression.

$x = \frac{3}{2} + \frac{- y}{1} + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.2.2.4

Divide $- y$ by $1$ .

$x = \frac{3}{2} - y + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} - y + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} - y + \frac{- 3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 1.2.3.1.3

Move the negative in front of the fraction.

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$4 x + 7 y + 5 z = 5$

$5 x + 3 y + 3 z = 7$

Step 2

Replace all occurrences of $x$ with $\frac{3}{2} - y - \frac{3 z}{4}$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $4 x + 7 y + 5 z = 5$ with $\frac{3}{2} - y - \frac{3 z}{4}$ .

$4 (\frac{3}{2} - y - \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $4 (\frac{3}{2} - y - \frac{3 z}{4}) + 7 y + 5 z$ .

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Step 2.2.1.1

Simplify each term.

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Step 2.2.1.1.1

Apply the distributive property.

$4 (\frac{3}{2}) + 4 (- y) + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Cancel the common factor of $2$ .

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Step 2.2.1.1.2.1.1

Factor $2$ out of $4$ .

$2 (2) (\frac{3}{2}) + 4 (- y) + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.1.2

Cancel the common factor.

$2 \cdot (2 (\frac{3}{2})) + 4 (- y) + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.1.3

Rewrite the expression.

$2 \cdot 3 + 4 (- y) + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$2 \cdot 3 + 4 (- y) + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.2

Multiply $2$ by $3$ .

$6 + 4 (- y) + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.3

Multiply $- 1$ by $4$ .

$6 - 4 y + 4 (- \frac{3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.4

Cancel the common factor of $4$ .

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Step 2.2.1.1.2.4.1

Move the leading negative in $- \frac{3 z}{4}$ into the numerator.

$6 - 4 y + 4 (\frac{- 3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.4.2

Cancel the common factor.

$6 - 4 y + 4 (\frac{- 3 z}{4}) + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.1.2.4.3

Rewrite the expression.

$6 - 4 y - 3 z + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$6 - 4 y - 3 z + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$6 - 4 y - 3 z + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$6 - 4 y - 3 z + 7 y + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Add $- 4 y$ and $7 y$ .

$6 + 3 y - 3 z + 5 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.2.1.2.2

Add $- 3 z$ and $5 z$ .

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$5 x + 3 y + 3 z = 7$

Step 2.3

Replace all occurrences of $x$ in $5 x + 3 y + 3 z = 7$ with $\frac{3}{2} - y - \frac{3 z}{4}$ .

$5 (\frac{3}{2} - y - \frac{3 z}{4}) + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $5 (\frac{3}{2} - y - \frac{3 z}{4}) + 3 y + 3 z$ .

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Step 2.4.1.1

Simplify each term.

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Step 2.4.1.1.1

Apply the distributive property.

$5 (\frac{3}{2}) + 5 (- y) + 5 (- \frac{3 z}{4}) + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.2

Simplify.

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Step 2.4.1.1.2.1

Multiply $5 (\frac{3}{2})$ .

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Step 2.4.1.1.2.1.1

Combine $5$ and $\frac{3}{2}$ .

$\frac{5 \cdot 3}{2} + 5 (- y) + 5 (- \frac{3 z}{4}) + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.2.1.2

Multiply $5$ by $3$ .

$\frac{15}{2} + 5 (- y) + 5 (- \frac{3 z}{4}) + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} + 5 (- y) + 5 (- \frac{3 z}{4}) + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.2.2

Multiply $- 1$ by $5$ .

$\frac{15}{2} - 5 y + 5 (- \frac{3 z}{4}) + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.2.3

Multiply $5 (- \frac{3 z}{4})$ .

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Step 2.4.1.1.2.3.1

Multiply $- 1$ by $5$ .

$\frac{15}{2} - 5 y - 5 \frac{3 z}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.2.3.2

Combine $- 5$ and $\frac{3 z}{4}$ .

$\frac{15}{2} - 5 y + \frac{- 5 (3 z)}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.2.3.3

Multiply $3$ by $- 5$ .

$\frac{15}{2} - 5 y + \frac{- 15 z}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 5 y + \frac{- 15 z}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 5 y + \frac{- 15 z}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.1.3

Move the negative in front of the fraction.

$\frac{15}{2} - 5 y - \frac{15 z}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 5 y - \frac{15 z}{4} + 3 y + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.2

Add $- 5 y$ and $3 y$ .

$\frac{15}{2} - 2 y - \frac{15 z}{4} + 3 z = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.3

To write $3 z$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$\frac{15}{2} - 2 y - \frac{15 z}{4} + 3 z \cdot \frac{4}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.4

Simplify terms.

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Step 2.4.1.4.1

Combine $3 z$ and $\frac{4}{4}$ .

$\frac{15}{2} - 2 y - \frac{15 z}{4} + \frac{3 z \cdot 4}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.4.2

Combine the numerators over the common denominator.

$\frac{15}{2} - 2 y + \frac{- 15 z + 3 z \cdot 4}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y + \frac{- 15 z + 3 z \cdot 4}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.5

Simplify each term.

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Step 2.4.1.5.1

Simplify the numerator.

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Step 2.4.1.5.1.1

Factor $3 z$ out of $- 15 z + 3 z \cdot 4$ .

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Step 2.4.1.5.1.1.1

Factor $3 z$ out of $- 15 z$ .

$\frac{15}{2} - 2 y + \frac{3 z (- 5) + 3 z \cdot 4}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.5.1.1.2

Factor $3 z$ out of $3 z \cdot 4$ .

$\frac{15}{2} - 2 y + \frac{3 z (- 5) + 3 z (4)}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.5.1.1.3

Factor $3 z$ out of $3 z (- 5) + 3 z (4)$ .

$\frac{15}{2} - 2 y + \frac{3 z (- 5 + 4)}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y + \frac{3 z (- 5 + 4)}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.5.1.2

Add $- 5$ and $4$ .

$\frac{15}{2} - 2 y + \frac{3 z \cdot - 1}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.5.1.3

Multiply $- 1$ by $3$ .

$\frac{15}{2} - 2 y + \frac{- 3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y + \frac{- 3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 2.4.1.5.2

Move the negative in front of the fraction.

$\frac{15}{2} - 2 y - \frac{3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y - \frac{3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y - \frac{3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y - \frac{3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{15}{2} - 2 y - \frac{3 z}{4} = 7$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3

Solve for $y$ in $\frac{15}{2} - 2 y - \frac{3 z}{4} = 7$ .

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Step 3.1

Move all terms not containing $y$ to the right side of the equation.

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Step 3.1.1

Subtract $\frac{15}{2}$ from both sides of the equation.

$- 2 y - \frac{3 z}{4} = 7 - \frac{15}{2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.2

Add $\frac{3 z}{4}$ to both sides of the equation.

$- 2 y = 7 - \frac{15}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.3

To write $7$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$- 2 y = 7 \cdot \frac{2}{2} - \frac{15}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.4

Combine $7$ and $\frac{2}{2}$ .

$- 2 y = \frac{7 \cdot 2}{2} - \frac{15}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.5

Combine the numerators over the common denominator.

$- 2 y = \frac{7 \cdot 2 - 15}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.6

Simplify the numerator.

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Step 3.1.6.1

Multiply $7$ by $2$ .

$- 2 y = \frac{14 - 15}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.6.2

Subtract $15$ from $14$ .

$- 2 y = \frac{- 1}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$- 2 y = \frac{- 1}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.1.7

Move the negative in front of the fraction.

$- 2 y = - \frac{1}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$- 2 y = - \frac{1}{2} + \frac{3 z}{4}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2

Divide each term in $- 2 y = - \frac{1}{2} + \frac{3 z}{4}$ by $- 2$ and simplify.

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Step 3.2.1

Divide each term in $- 2 y = - \frac{1}{2} + \frac{3 z}{4}$ by $- 2$ .

$\frac{- 2 y}{- 2} = \frac{- \frac{1}{2}}{- 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.2

Simplify the left side.

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Step 3.2.2.1

Cancel the common factor of $- 2$ .

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Step 3.2.2.1.1

Cancel the common factor.

$\frac{- 2 y}{- 2} = \frac{- \frac{1}{2}}{- 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{- \frac{1}{2}}{- 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{- \frac{1}{2}}{- 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{- \frac{1}{2}}{- 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3

Simplify the right side.

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Step 3.2.3.1

Simplify each term.

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Step 3.2.3.1.1

Multiply the numerator by the reciprocal of the denominator.

$y = - \frac{1}{2} \cdot \frac{1}{- 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.2

Move the negative in front of the fraction.

$y = - \frac{1}{2} \cdot (- \frac{1}{2}) + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.3

Multiply $- \frac{1}{2} (- \frac{1}{2})$ .

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Step 3.2.3.1.3.1

Multiply $- 1$ by $- 1$ .

$y = 1 (\frac{1}{2}) \cdot \frac{1}{2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.3.2

Multiply $\frac{1}{2}$ by $1$ .

$y = \frac{1}{2} \cdot \frac{1}{2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.3.3

Multiply $\frac{1}{2}$ by $\frac{1}{2}$ .

$y = \frac{1}{2 \cdot 2} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.3.4

Multiply $2$ by $2$ .

$y = \frac{1}{4} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{1}{4} + \frac{\frac{3 z}{4}}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.4

Multiply the numerator by the reciprocal of the denominator.

$y = \frac{1}{4} + \frac{3 z}{4} \cdot \frac{1}{- 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.5

Move the negative in front of the fraction.

$y = \frac{1}{4} + \frac{3 z}{4} \cdot (- \frac{1}{2})$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.6

Multiply $\frac{3 z}{4} (- \frac{1}{2})$ .

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Step 3.2.3.1.6.1

Multiply $\frac{3 z}{4}$ by $\frac{1}{2}$ .

$y = \frac{1}{4} - \frac{3 z}{4 \cdot 2}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 3.2.3.1.6.2

Multiply $4$ by $2$ .

$y = \frac{1}{4} - \frac{3 z}{8}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$6 + 3 y + 2 z = 5$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4

Replace all occurrences of $y$ with $\frac{1}{4} - \frac{3 z}{8}$ in each equation.

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Step 4.1

Replace all occurrences of $y$ in $6 + 3 y + 2 z = 5$ with $\frac{1}{4} - \frac{3 z}{8}$ .

$6 + 3 (\frac{1}{4} - \frac{3 z}{8}) + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $6 + 3 (\frac{1}{4} - \frac{3 z}{8}) + 2 z$ .

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Step 4.2.1.1

Simplify each term.

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Step 4.2.1.1.1

Apply the distributive property.

$6 + 3 (\frac{1}{4}) + 3 (- \frac{3 z}{8}) + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.1.2

Combine $3$ and $\frac{1}{4}$ .

$6 + \frac{3}{4} + 3 (- \frac{3 z}{8}) + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.1.3

Multiply $3 (- \frac{3 z}{8})$ .

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Step 4.2.1.1.3.1

Multiply $- 1$ by $3$ .

$6 + \frac{3}{4} - 3 \frac{3 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.1.3.2

Combine $- 3$ and $\frac{3 z}{8}$ .

$6 + \frac{3}{4} + \frac{- 3 (3 z)}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.1.3.3

Multiply $3$ by $- 3$ .

$6 + \frac{3}{4} + \frac{- 9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$6 + \frac{3}{4} + \frac{- 9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.1.4

Move the negative in front of the fraction.

$6 + \frac{3}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$6 + \frac{3}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.2

To write $6$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$6 \cdot \frac{4}{4} + \frac{3}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.3

Combine $6$ and $\frac{4}{4}$ .

$\frac{6 \cdot 4}{4} + \frac{3}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.4

Combine the numerators over the common denominator.

$\frac{6 \cdot 4 + 3}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.5

Simplify the numerator.

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Step 4.2.1.5.1

Multiply $6$ by $4$ .

$\frac{24 + 3}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.5.2

Add $24$ and $3$ .

$\frac{27}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} - \frac{9 z}{8} + 2 z = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.6

To write $2 z$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$\frac{27}{4} - \frac{9 z}{8} + 2 z \cdot \frac{8}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.7

Simplify terms.

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Step 4.2.1.7.1

Combine $2 z$ and $\frac{8}{8}$ .

$\frac{27}{4} - \frac{9 z}{8} + \frac{2 z \cdot 8}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.7.2

Combine the numerators over the common denominator.

$\frac{27}{4} + \frac{- 9 z + 2 z \cdot 8}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} + \frac{- 9 z + 2 z \cdot 8}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.8

Simplify each term.

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Step 4.2.1.8.1

Simplify the numerator.

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Step 4.2.1.8.1.1

Factor $z$ out of $- 9 z + 2 z \cdot 8$ .

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Step 4.2.1.8.1.1.1

Factor $z$ out of $- 9 z$ .

$\frac{27}{4} + \frac{z \cdot - 9 + 2 z \cdot 8}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.8.1.1.2

Factor $z$ out of $2 z \cdot 8$ .

$\frac{27}{4} + \frac{z \cdot - 9 + z (2 \cdot 8)}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.8.1.1.3

Factor $z$ out of $z \cdot - 9 + z (2 \cdot 8)$ .

$\frac{27}{4} + \frac{z (- 9 + 2 \cdot 8)}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} + \frac{z (- 9 + 2 \cdot 8)}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.8.1.2

Multiply $2$ by $8$ .

$\frac{27}{4} + \frac{z (- 9 + 16)}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.8.1.3

Add $- 9$ and $16$ .

$\frac{27}{4} + \frac{z \cdot 7}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} + \frac{z \cdot 7}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.2.1.8.2

Move $7$ to the left of $z$ .

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3}{2} - y - \frac{3 z}{4}$

Step 4.3

Replace all occurrences of $y$ in $x = \frac{3}{2} - y - \frac{3 z}{4}$ with $\frac{1}{4} - \frac{3 z}{8}$ .

$x = \frac{3}{2} - (\frac{1}{4} - \frac{3 z}{8}) - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4

Simplify the right side.

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Step 4.4.1

Simplify $\frac{3}{2} - (\frac{1}{4} - \frac{3 z}{8}) - \frac{3 z}{4}$ .

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Step 4.4.1.1

Find the common denominator.

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Step 4.4.1.1.1

Multiply $\frac{3}{2}$ by $\frac{2}{2}$ .

$x = \frac{3}{2} \cdot \frac{2}{2} - (\frac{1}{4} - \frac{3 z}{8}) - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.1.2

Multiply $\frac{3}{2}$ by $\frac{2}{2}$ .

$x = \frac{3 \cdot 2}{2 \cdot 2} - (\frac{1}{4} - \frac{3 z}{8}) - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.1.3

Write $- (\frac{1}{4} - \frac{3 z}{8})$ as a fraction with denominator $1$ .

$x = \frac{3 \cdot 2}{2 \cdot 2} + \frac{- (\frac{1}{4} - \frac{3 z}{8})}{1} - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.1.4

Multiply $\frac{- (\frac{1}{4} - \frac{3 z}{8})}{1}$ by $\frac{4}{4}$ .

$x = \frac{3 \cdot 2}{2 \cdot 2} + \frac{- (\frac{1}{4} - \frac{3 z}{8})}{1} \cdot \frac{4}{4} - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.1.5

Multiply $\frac{- (\frac{1}{4} - \frac{3 z}{8})}{1}$ by $\frac{4}{4}$ .

$x = \frac{3 \cdot 2}{2 \cdot 2} + \frac{- (\frac{1}{4} - \frac{3 z}{8}) \cdot 4}{4} - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.1.6

Multiply $2$ by $2$ .

$x = \frac{3 \cdot 2}{4} + \frac{- (\frac{1}{4} - \frac{3 z}{8}) \cdot 4}{4} - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{3 \cdot 2}{4} + \frac{- (\frac{1}{4} - \frac{3 z}{8}) \cdot 4}{4} - \frac{3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.2

Combine the numerators over the common denominator.

$x = \frac{3 \cdot 2 - (\frac{1}{4} - \frac{3 z}{8}) \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3

Simplify each term.

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Step 4.4.1.3.1

Multiply $3$ by $2$ .

$x = \frac{6 - (\frac{1}{4} - \frac{3 z}{8}) \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.2

Apply the distributive property.

$x = \frac{6 + (- \frac{1}{4} + \frac{3 z}{8}) \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.3

Multiply $- - \frac{3 z}{8}$ .

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Step 4.4.1.3.3.1

Multiply $- 1$ by $- 1$ .

$x = \frac{6 + (- \frac{1}{4} + 1 (\frac{3 z}{8})) \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.3.2

Multiply $\frac{3 z}{8}$ by $1$ .

$x = \frac{6 + (- \frac{1}{4} + \frac{3 z}{8}) \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{6 + (- \frac{1}{4} + \frac{3 z}{8}) \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.4

Apply the distributive property.

$x = \frac{6 - \frac{1}{4} \cdot 4 + \frac{3 z}{8} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.5

Cancel the common factor of $4$ .

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Step 4.4.1.3.5.1

Move the leading negative in $- \frac{1}{4}$ into the numerator.

$x = \frac{6 + \frac{- 1}{4} \cdot 4 + \frac{3 z}{8} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.5.2

Cancel the common factor.

$x = \frac{6 + \frac{- 1}{4} \cdot 4 + \frac{3 z}{8} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.5.3

Rewrite the expression.

$x = \frac{6 - 1 + \frac{3 z}{8} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{6 - 1 + \frac{3 z}{8} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.6

Cancel the common factor of $4$ .

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Step 4.4.1.3.6.1

Factor $4$ out of $8$ .

$x = \frac{6 - 1 + \frac{3 z}{4 (2)} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.6.2

Cancel the common factor.

$x = \frac{6 - 1 + \frac{3 z}{4 \cdot 2} \cdot 4 - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.3.6.3

Rewrite the expression.

$x = \frac{6 - 1 + \frac{3 z}{2} - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{6 - 1 + \frac{3 z}{2} - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{6 - 1 + \frac{3 z}{2} - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.4

Subtract $1$ from $6$ .

$x = \frac{5 + \frac{3 z}{2} - 3 z}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.5

To write $- 3 z$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$x = \frac{5 + \frac{3 z}{2} - 3 z \cdot \frac{2}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6

Simplify terms.

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Step 4.4.1.6.1

Combine $- 3 z$ and $\frac{2}{2}$ .

$x = \frac{5 + \frac{3 z}{2} + \frac{- 3 z \cdot 2}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.2

Combine the numerators over the common denominator.

$x = \frac{5 + \frac{3 z - 3 z \cdot 2}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3

Simplify each term.

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Step 4.4.1.6.3.1

Simplify the numerator.

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Step 4.4.1.6.3.1.1

Factor $3 z$ out of $3 z - 3 z \cdot 2$ .

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Step 4.4.1.6.3.1.1.1

Factor $3 z$ out of $3 z$ .

$x = \frac{5 + \frac{3 z (1) - 3 z \cdot 2}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3.1.1.2

Factor $3 z$ out of $- 3 z \cdot 2$ .

$x = \frac{5 + \frac{3 z (1) + 3 z (- 1 \cdot 2)}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3.1.1.3

Factor $3 z$ out of $3 z (1) + 3 z (- 1 \cdot 2)$ .

$x = \frac{5 + \frac{3 z (1 - 1 \cdot 2)}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{5 + \frac{3 z (1 - 1 \cdot 2)}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3.1.2

Multiply $- 1$ by $2$ .

$x = \frac{5 + \frac{3 z (1 - 2)}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3.1.3

Subtract $2$ from $1$ .

$x = \frac{5 + \frac{3 z \cdot - 1}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3.1.4

Multiply $- 1$ by $3$ .

$x = \frac{5 + \frac{- 3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{5 + \frac{- 3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.6.3.2

Move the negative in front of the fraction.

$x = \frac{5 - \frac{3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{5 - \frac{3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{5 - \frac{3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.7

Simplify the numerator.

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Step 4.4.1.7.1

To write $5$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$x = \frac{5 \cdot \frac{2}{2} - \frac{3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.7.2

Combine $5$ and $\frac{2}{2}$ .

$x = \frac{\frac{5 \cdot 2}{2} - \frac{3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.7.3

Combine the numerators over the common denominator.

$x = \frac{\frac{5 \cdot 2 - 3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.7.4

Multiply $5$ by $2$ .

$x = \frac{\frac{10 - 3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{\frac{10 - 3 z}{2}}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.8

Multiply the numerator by the reciprocal of the denominator.

$x = \frac{10 - 3 z}{2} \cdot \frac{1}{4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.9

Multiply $\frac{10 - 3 z}{2} \cdot \frac{1}{4}$ .

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Step 4.4.1.9.1

Multiply $\frac{10 - 3 z}{2}$ by $\frac{1}{4}$ .

$x = \frac{10 - 3 z}{2 \cdot 4}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 4.4.1.9.2

Multiply $2$ by $4$ .

$x = \frac{10 - 3 z}{8}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{10 - 3 z}{8}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{10 - 3 z}{8}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{10 - 3 z}{8}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{10 - 3 z}{8}$

$\frac{27}{4} + \frac{7 z}{8} = 5$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5

Solve for $z$ in $\frac{27}{4} + \frac{7 z}{8} = 5$ .

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Step 5.1

Move all terms not containing $z$ to the right side of the equation.

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Step 5.1.1

Subtract $\frac{27}{4}$ from both sides of the equation.

$\frac{7 z}{8} = 5 - \frac{27}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.1.2

To write $5$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$\frac{7 z}{8} = 5 \cdot \frac{4}{4} - \frac{27}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.1.3

Combine $5$ and $\frac{4}{4}$ .

$\frac{7 z}{8} = \frac{5 \cdot 4}{4} - \frac{27}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.1.4

Combine the numerators over the common denominator.

$\frac{7 z}{8} = \frac{5 \cdot 4 - 27}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.1.5

Simplify the numerator.

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Step 5.1.5.1

Multiply $5$ by $4$ .

$\frac{7 z}{8} = \frac{20 - 27}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.1.5.2

Subtract $27$ from $20$ .

$\frac{7 z}{8} = \frac{- 7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$\frac{7 z}{8} = \frac{- 7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.1.6

Move the negative in front of the fraction.

$\frac{7 z}{8} = - \frac{7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$\frac{7 z}{8} = - \frac{7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.2

Multiply both sides of the equation by $\frac{8}{7}$ .

$\frac{8}{7} \cdot \frac{7 z}{8} = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3

Simplify both sides of the equation.

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Step 5.3.1

Simplify the left side.

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Step 5.3.1.1

Simplify $\frac{8}{7} \cdot \frac{7 z}{8}$ .

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Step 5.3.1.1.1

Cancel the common factor of $8$ .

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Step 5.3.1.1.1.1

Cancel the common factor.

$\frac{8}{7} \cdot \frac{7 z}{8} = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.1.1.1.2

Rewrite the expression.

$\frac{1}{7} \cdot (7 z) = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$\frac{1}{7} \cdot (7 z) = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.1.1.2

Cancel the common factor of $7$ .

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Step 5.3.1.1.2.1

Factor $7$ out of $7 z$ .

$\frac{1}{7} \cdot (7 (z)) = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.1.1.2.2

Cancel the common factor.

$\frac{1}{7} \cdot (7 z) = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.1.1.2.3

Rewrite the expression.

$z = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = \frac{8}{7} \cdot (- \frac{7}{4})$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2

Simplify the right side.

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Step 5.3.2.1

Simplify $\frac{8}{7} (- \frac{7}{4})$ .

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Step 5.3.2.1.1

Cancel the common factor of $4$ .

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Step 5.3.2.1.1.1

Move the leading negative in $- \frac{7}{4}$ into the numerator.

$z = \frac{8}{7} \cdot \frac{- 7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.1.2

Factor $4$ out of $8$ .

$z = \frac{4 (2)}{7} \cdot \frac{- 7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.1.3

Cancel the common factor.

$z = \frac{4 \cdot 2}{7} \cdot \frac{- 7}{4}$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.1.4

Rewrite the expression.

$z = \frac{2}{7} \cdot - 7$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = \frac{2}{7} \cdot - 7$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.2

Cancel the common factor of $7$ .

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Step 5.3.2.1.2.1

Factor $7$ out of $- 7$ .

$z = \frac{2}{7} \cdot (7 (- 1))$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.2.2

Cancel the common factor.

$z = \frac{2}{7} \cdot (7 \cdot - 1)$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.2.3

Rewrite the expression.

$z = 2 \cdot - 1$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = 2 \cdot - 1$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 5.3.2.1.3

Multiply $2$ by $- 1$ .

$z = - 2$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = - 2$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = - 2$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = - 2$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

$z = - 2$

$x = \frac{10 - 3 z}{8}$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6

Replace all occurrences of $z$ with $- 2$ in each equation.

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Step 6.1

Replace all occurrences of $z$ in $x = \frac{10 - 3 z}{8}$ with $- 2$ .

$x = \frac{10 - 3 \cdot - 2}{8}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $\frac{10 - 3 \cdot - 2}{8}$ .

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Step 6.2.1.1

Cancel the common factor of $10 - 3 \cdot - 2$ and $8$ .

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Step 6.2.1.1.1

Rewrite $10$ as $- 1 (- 10)$ .

$x = \frac{- 1 \cdot - 10 - 3 \cdot - 2}{8}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.2

Factor $- 1$ out of $- 3 \cdot - 2$ .

$x = \frac{- 1 \cdot - 10 - (3 \cdot - 2)}{8}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.3

Factor $- 1$ out of $- 1 (- 10) - (3 \cdot - 2)$ .

$x = \frac{- 1 (- 10 + 3 \cdot - 2)}{8}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.4

Reorder terms.

$x = \frac{- 1 (- 10 - 2 \cdot 3)}{8}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.5

Factor $2$ out of $- 1 (- 10 - 2 \cdot 3)$ .

$x = \frac{2 (- 1 (- 5 - 1 \cdot 3))}{8}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.6

Cancel the common factors.

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Step 6.2.1.1.6.1

Factor $2$ out of $8$ .

$x = \frac{2 (- 1 (- 5 - 1 \cdot 3))}{2 (4)}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.6.2

Cancel the common factor.

$x = \frac{2 (- 1 (- 5 - 1 \cdot 3))}{2 \cdot 4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.1.6.3

Rewrite the expression.

$x = \frac{- 1 (- 5 - 1 \cdot 3)}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{- 1 (- 5 - 1 \cdot 3)}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{- 1 (- 5 - 1 \cdot 3)}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.2

Simplify the numerator.

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Step 6.2.1.2.1

Multiply $- 1$ by $3$ .

$x = \frac{- 1 (- 5 - 3)}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.2.2

Subtract $3$ from $- 5$ .

$x = \frac{- 1 \cdot - 8}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = \frac{- 1 \cdot - 8}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.3

Simplify the expression.

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Step 6.2.1.3.1

Multiply $- 1$ by $- 8$ .

$x = \frac{8}{4}$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.2.1.3.2

Divide $8$ by $4$ .

$x = 2$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} - \frac{3 z}{8}$

Step 6.3

Replace all occurrences of $z$ in $y = \frac{1}{4} - \frac{3 z}{8}$ with $- 2$ .

$y = \frac{1}{4} - \frac{3 (- 2)}{8}$

$x = 2$

$z = - 2$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $\frac{1}{4} - \frac{3 (- 2)}{8}$ .

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Step 6.4.1.1

Simplify each term.

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Step 6.4.1.1.1

Cancel the common factor of $- 2$ and $8$ .

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Step 6.4.1.1.1.1

Factor $2$ out of $3 (- 2)$ .

$y = \frac{1}{4} - \frac{2 (3 \cdot (- 1))}{8}$

$x = 2$

$z = - 2$

Step 6.4.1.1.1.2

Cancel the common factors.

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Step 6.4.1.1.1.2.1

Factor $2$ out of $8$ .

$y = \frac{1}{4} - \frac{2 (3 \cdot (- 1))}{2 (4)}$

$x = 2$

$z = - 2$

Step 6.4.1.1.1.2.2

Cancel the common factor.

$y = \frac{1}{4} - \frac{2 (3 \cdot (- 1))}{2 \cdot 4}$

$x = 2$

$z = - 2$

Step 6.4.1.1.1.2.3

Rewrite the expression.

$y = \frac{1}{4} - \frac{3 \cdot (- 1)}{4}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} - \frac{3 \cdot (- 1)}{4}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} - \frac{3 \cdot (- 1)}{4}$

$x = 2$

$z = - 2$

Step 6.4.1.1.2

Multiply $3$ by $- 1$ .

$y = \frac{1}{4} - \frac{- 3}{4}$

$x = 2$

$z = - 2$

Step 6.4.1.1.3

Move the negative in front of the fraction.

$y = \frac{1}{4} + \frac{3}{4}$

$x = 2$

$z = - 2$

Step 6.4.1.1.4

Multiply $- - \frac{3}{4}$ .

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Step 6.4.1.1.4.1

Multiply $- 1$ by $- 1$ .

$y = \frac{1}{4} + 1 (\frac{3}{4})$

$x = 2$

$z = - 2$

Step 6.4.1.1.4.2

Multiply $\frac{3}{4}$ by $1$ .

$y = \frac{1}{4} + \frac{3}{4}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} + \frac{3}{4}$

$x = 2$

$z = - 2$

$y = \frac{1}{4} + \frac{3}{4}$

$x = 2$

$z = - 2$

Step 6.4.1.2

Combine fractions.

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Step 6.4.1.2.1

Combine the numerators over the common denominator.

$y = \frac{1 + 3}{4}$

$x = 2$

$z = - 2$

Step 6.4.1.2.2

Simplify the expression.

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Step 6.4.1.2.2.1

Add $1$ and $3$ .

$y = \frac{4}{4}$

$x = 2$

$z = - 2$

Step 6.4.1.2.2.2

Divide $4$ by $4$ .

$y = 1$

$x = 2$

$z = - 2$

$y = 1$

$x = 2$

$z = - 2$

$y = 1$

$x = 2$

$z = - 2$

$y = 1$

$x = 2$

$z = - 2$

$y = 1$

$x = 2$

$z = - 2$

$y = 1$

$x = 2$

$z = - 2$

Step 7

The solution to the system is the complete set of ordered pairs that are valid solutions.

$(2, 1, - 2)$

Step 8

The result can be shown in multiple forms.

Point Form:

$(2, 1, - 2)$

Equation Form:

$x = 2, y = 1, z = - 2$