Algebra Examples

$4 x - 2 y + 3 z = 1$ $x + 3 y - 4 z = - 7$ $3 x + y + 2 z = 5$

Step 1

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

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Step 1.1

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

$x - 4 z = - 7 - 3 y$

$4 x - 2 y + 3 z = 1$

$3 x + y + 2 z = 5$

Step 1.2

Add $4 z$ to both sides of the equation.

$x = - 7 - 3 y + 4 z$

$4 x - 2 y + 3 z = 1$

$3 x + y + 2 z = 5$

$x = - 7 - 3 y + 4 z$

$4 x - 2 y + 3 z = 1$

$3 x + y + 2 z = 5$

Step 2

Replace all occurrences of $x$ with $- 7 - 3 y + 4 z$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $4 x - 2 y + 3 z = 1$ with $- 7 - 3 y + 4 z$ .

$4 (- 7 - 3 y + 4 z) - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $4 (- 7 - 3 y + 4 z) - 2 y + 3 z$ .

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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.

$4 \cdot - 7 + 4 (- 3 y) + 4 (4 z) - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $4$ by $- 7$ .

$- 28 + 4 (- 3 y) + 4 (4 z) - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.2.1.1.2.2

Multiply $- 3$ by $4$ .

$- 28 - 12 y + 4 (4 z) - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.2.1.1.2.3

Multiply $4$ by $4$ .

$- 28 - 12 y + 16 z - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

$- 28 - 12 y + 16 z - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

$- 28 - 12 y + 16 z - 2 y + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Subtract $2 y$ from $- 12 y$ .

$- 28 - 14 y + 16 z + 3 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.2.1.2.2

Add $16 z$ and $3 z$ .

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$3 x + y + 2 z = 5$

Step 2.3

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

$3 (- 7 - 3 y + 4 z) + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $3 (- 7 - 3 y + 4 z) + y + 2 z$ .

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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.

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

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 2.4.1.1.2

Simplify.

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Step 2.4.1.1.2.1

Multiply $3$ by $- 7$ .

$- 21 + 3 (- 3 y) + 3 (4 z) + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 2.4.1.1.2.2

Multiply $- 3$ by $3$ .

$- 21 - 9 y + 3 (4 z) + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 2.4.1.1.2.3

Multiply $4$ by $3$ .

$- 21 - 9 y + 12 z + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 21 - 9 y + 12 z + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 21 - 9 y + 12 z + y + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 2.4.1.2

Simplify by adding terms.

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Step 2.4.1.2.1

Add $- 9 y$ and $y$ .

$- 21 - 8 y + 12 z + 2 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 2.4.1.2.2

Add $12 z$ and $2 z$ .

$- 21 - 8 y + 14 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 21 - 8 y + 14 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 21 - 8 y + 14 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 21 - 8 y + 14 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 21 - 8 y + 14 z = 5$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3

Solve for $y$ in $- 21 - 8 y + 14 z = 5$ .

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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

Add $21$ to both sides of the equation.

$- 8 y + 14 z = 5 + 21$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.1.2

Subtract $14 z$ from both sides of the equation.

$- 8 y = 5 + 21 - 14 z$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.1.3

Add $5$ and $21$ .

$- 8 y = 26 - 14 z$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$- 8 y = 26 - 14 z$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2

Divide each term in $- 8 y = 26 - 14 z$ by $- 8$ and simplify.

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Step 3.2.1

Divide each term in $- 8 y = 26 - 14 z$ by $- 8$ .

$\frac{- 8 y}{- 8} = \frac{26}{- 8} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.2

Simplify the left side.

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Step 3.2.2.1

Cancel the common factor of $- 8$ .

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Step 3.2.2.1.1

Cancel the common factor.

$\frac{- 8 y}{- 8} = \frac{26}{- 8} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{26}{- 8} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = \frac{26}{- 8} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = \frac{26}{- 8} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

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

Cancel the common factor of $26$ and $- 8$ .

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Step 3.2.3.1.1.1

Factor $2$ out of $26$ .

$y = \frac{2 (13)}{- 8} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.1.2

Cancel the common factors.

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Step 3.2.3.1.1.2.1

Factor $2$ out of $- 8$ .

$y = \frac{2 \cdot 13}{2 \cdot - 4} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.1.2.2

Cancel the common factor.

$y = \frac{2 \cdot 13}{2 \cdot - 4} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.1.2.3

Rewrite the expression.

$y = \frac{13}{- 4} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = \frac{13}{- 4} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = \frac{13}{- 4} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.2

Move the negative in front of the fraction.

$y = - \frac{13}{4} + \frac{- 14 z}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.3

Cancel the common factor of $- 14$ and $- 8$ .

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Step 3.2.3.1.3.1

Factor $- 2$ out of $- 14 z$ .

$y = - \frac{13}{4} + \frac{- 2 (7 z)}{- 8}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.3.2

Cancel the common factors.

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Step 3.2.3.1.3.2.1

Factor $- 2$ out of $- 8$ .

$y = - \frac{13}{4} + \frac{- 2 (7 z)}{- 2 \cdot 4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.3.2.2

Cancel the common factor.

$y = - \frac{13}{4} + \frac{- 2 (7 z)}{- 2 \cdot 4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 3.2.3.1.3.2.3

Rewrite the expression.

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 28 - 14 y + 19 z = 1$

$x = - 7 - 3 y + 4 z$

Step 4

Replace all occurrences of $y$ with $- \frac{13}{4} + \frac{7 z}{4}$ in each equation.

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Step 4.1

Replace all occurrences of $y$ in $- 28 - 14 y + 19 z = 1$ with $- \frac{13}{4} + \frac{7 z}{4}$ .

$- 28 - 14 (- \frac{13}{4} + \frac{7 z}{4}) + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $- 28 - 14 (- \frac{13}{4} + \frac{7 z}{4}) + 19 z$ .

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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.

$- 28 - 14 (- \frac{13}{4}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.2

Cancel the common factor of $2$ .

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Step 4.2.1.1.2.1

Move the leading negative in $- \frac{13}{4}$ into the numerator.

$- 28 - 14 (\frac{- 13}{4}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.2.2

Factor $2$ out of $- 14$ .

$- 28 + 2 (- 7) (\frac{- 13}{4}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.2.3

Factor $2$ out of $4$ .

$- 28 + 2 \cdot (- 7 \frac{- 13}{2 \cdot 2}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.2.4

Cancel the common factor.

$- 28 + 2 \cdot (- 7 \frac{- 13}{2 \cdot 2}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.2.5

Rewrite the expression.

$- 28 - 7 (\frac{- 13}{2}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

$- 28 - 7 (\frac{- 13}{2}) - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.3

Combine $- 7$ and $\frac{- 13}{2}$ .

$- 28 + \frac{- 7 \cdot - 13}{2} - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.4

Multiply $- 7$ by $- 13$ .

$- 28 + \frac{91}{2} - 14 \frac{7 z}{4} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.5

Cancel the common factor of $2$ .

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Step 4.2.1.1.5.1

Factor $2$ out of $- 14$ .

$- 28 + \frac{91}{2} + 2 (- 7) (\frac{7 z}{4}) + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.5.2

Factor $2$ out of $4$ .

$- 28 + \frac{91}{2} + 2 \cdot (- 7 \frac{7 z}{2 \cdot 2}) + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.5.3

Cancel the common factor.

$- 28 + \frac{91}{2} + 2 \cdot (- 7 \frac{7 z}{2 \cdot 2}) + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.5.4

Rewrite the expression.

$- 28 + \frac{91}{2} - 7 \frac{7 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

$- 28 + \frac{91}{2} - 7 \frac{7 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.6

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

$- 28 + \frac{91}{2} + \frac{- 7 (7 z)}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.7

Multiply $7$ by $- 7$ .

$- 28 + \frac{91}{2} + \frac{- 49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.1.8

Move the negative in front of the fraction.

$- 28 + \frac{91}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

$- 28 + \frac{91}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.2

To write $- 28$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$- 28 \cdot \frac{2}{2} + \frac{91}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.3

Combine $- 28$ and $\frac{2}{2}$ .

$\frac{- 28 \cdot 2}{2} + \frac{91}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.4

Combine the numerators over the common denominator.

$\frac{- 28 \cdot 2 + 91}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.5

Simplify the numerator.

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Step 4.2.1.5.1

Multiply $- 28$ by $2$ .

$\frac{- 56 + 91}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.5.2

Add $- 56$ and $91$ .

$\frac{35}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

$\frac{35}{2} - \frac{49 z}{2} + 19 z = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.6

To write $19 z$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$\frac{35}{2} - \frac{49 z}{2} + 19 z \cdot \frac{2}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.7

Combine $19 z$ and $\frac{2}{2}$ .

$\frac{35}{2} - \frac{49 z}{2} + \frac{19 z \cdot 2}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.8

Combine the numerators over the common denominator.

$\frac{35}{2} + \frac{- 49 z + 19 z \cdot 2}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.9

Combine the numerators over the common denominator.

$\frac{35 - 49 z + 19 z \cdot 2}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.10

Multiply $2$ by $19$ .

$\frac{35 - 49 z + 38 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.2.1.11

Add $- 49 z$ and $38 z$ .

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 - 3 y + 4 z$

Step 4.3

Replace all occurrences of $y$ in $x = - 7 - 3 y + 4 z$ with $- \frac{13}{4} + \frac{7 z}{4}$ .

$x = - 7 - 3 (- \frac{13}{4} + \frac{7 z}{4}) + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4

Simplify the right side.

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Step 4.4.1

Simplify $- 7 - 3 (- \frac{13}{4} + \frac{7 z}{4}) + 4 z$ .

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Step 4.4.1.1

Simplify each term.

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Step 4.4.1.1.1

Apply the distributive property.

$x = - 7 - 3 (- \frac{13}{4}) - 3 \frac{7 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.1.2

Multiply $- 3 (- \frac{13}{4})$ .

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Step 4.4.1.1.2.1

Multiply $- 1$ by $- 3$ .

$x = - 7 + 3 (\frac{13}{4}) - 3 \frac{7 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.1.2.2

Combine $3$ and $\frac{13}{4}$ .

$x = - 7 + \frac{3 \cdot 13}{4} - 3 \frac{7 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.1.2.3

Multiply $3$ by $13$ .

$x = - 7 + \frac{39}{4} - 3 \frac{7 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 + \frac{39}{4} - 3 \frac{7 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.1.3

Multiply $- 3 \frac{7 z}{4}$ .

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Step 4.4.1.1.3.1

Combine $- 3$ and $\frac{7 z}{4}$ .

$x = - 7 + \frac{39}{4} + \frac{- 3 (7 z)}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.1.3.2

Multiply $7$ by $- 3$ .

$x = - 7 + \frac{39}{4} + \frac{- 21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 + \frac{39}{4} + \frac{- 21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.1.4

Move the negative in front of the fraction.

$x = - 7 + \frac{39}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 7 + \frac{39}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.2

To write $- 7$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$x = - 7 \cdot \frac{4}{4} + \frac{39}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.3

Combine $- 7$ and $\frac{4}{4}$ .

$x = \frac{- 7 \cdot 4}{4} + \frac{39}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.4

Combine the numerators over the common denominator.

$x = \frac{- 7 \cdot 4 + 39}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.5

Simplify the numerator.

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Step 4.4.1.5.1

Multiply $- 7$ by $4$ .

$x = \frac{- 28 + 39}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.5.2

Add $- 28$ and $39$ .

$x = \frac{11}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = \frac{11}{4} - \frac{21 z}{4} + 4 z$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.6

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

$x = \frac{11}{4} - \frac{21 z}{4} + 4 z \cdot \frac{4}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.7

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

$x = \frac{11}{4} - \frac{21 z}{4} + \frac{4 z \cdot 4}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.8

Combine the numerators over the common denominator.

$x = \frac{11}{4} + \frac{- 21 z + 4 z \cdot 4}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.9

Combine the numerators over the common denominator.

$x = \frac{11 - 21 z + 4 z \cdot 4}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.10

Multiply $4$ by $4$ .

$x = \frac{11 - 21 z + 16 z}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 4.4.1.11

Add $- 21 z$ and $16 z$ .

$x = \frac{11 - 5 z}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = \frac{11 - 5 z}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = \frac{11 - 5 z}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = \frac{11 - 5 z}{4}$

$\frac{35 - 11 z}{2} = 1$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5

Solve for $z$ in $\frac{35 - 11 z}{2} = 1$ .

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Step 5.1

Multiply both sides by $2$ .

$\frac{35 - 11 z}{2} \cdot 2 = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.2

Simplify.

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Step 5.2.1

Simplify the left side.

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Step 5.2.1.1

Simplify $\frac{35 - 11 z}{2} \cdot 2$ .

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Step 5.2.1.1.1

Cancel the common factor of $2$ .

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Step 5.2.1.1.1.1

Cancel the common factor.

$\frac{35 - 11 z}{2} \cdot 2 = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.2.1.1.1.2

Rewrite the expression.

$35 - 11 z = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$35 - 11 z = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.2.1.1.2

Reorder $35$ and $- 11 z$ .

$- 11 z + 35 = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 11 z + 35 = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 11 z + 35 = 1 \cdot 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.2.2

Simplify the right side.

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Step 5.2.2.1

Multiply $2$ by $1$ .

$- 11 z + 35 = 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 11 z + 35 = 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 11 z + 35 = 2$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.3

Solve for $z$ .

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Step 5.3.1

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

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Step 5.3.1.1

Subtract $35$ from both sides of the equation.

$- 11 z = 2 - 35$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.3.1.2

Subtract $35$ from $2$ .

$- 11 z = - 33$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$- 11 z = - 33$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.3.2

Divide each term in $- 11 z = - 33$ by $- 11$ and simplify.

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Step 5.3.2.1

Divide each term in $- 11 z = - 33$ by $- 11$ .

$\frac{- 11 z}{- 11} = \frac{- 33}{- 11}$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.3.2.2

Simplify the left side.

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Step 5.3.2.2.1

Cancel the common factor of $- 11$ .

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Step 5.3.2.2.1.1

Cancel the common factor.

$\frac{- 11 z}{- 11} = \frac{- 33}{- 11}$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.3.2.2.1.2

Divide $z$ by $1$ .

$z = \frac{- 33}{- 11}$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$z = \frac{- 33}{- 11}$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$z = \frac{- 33}{- 11}$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 5.3.2.3

Simplify the right side.

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Step 5.3.2.3.1

Divide $- 33$ by $- 11$ .

$z = 3$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$z = 3$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$z = 3$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$z = 3$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$z = 3$

$x = \frac{11 - 5 z}{4}$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 6

Replace all occurrences of $z$ with $3$ in each equation.

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Step 6.1

Replace all occurrences of $z$ in $x = \frac{11 - 5 z}{4}$ with $3$ .

$x = \frac{11 - 5 \cdot 3}{4}$

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $\frac{11 - 5 \cdot 3}{4}$ .

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Step 6.2.1.1

Simplify the numerator.

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Step 6.2.1.1.1

Multiply $- 5$ by $3$ .

$x = \frac{11 - 15}{4}$

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 6.2.1.1.2

Subtract $15$ from $11$ .

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

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

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

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 6.2.1.2

Divide $- 4$ by $4$ .

$x = - 1$

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 1$

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

$x = - 1$

$z = 3$

$y = - \frac{13}{4} + \frac{7 z}{4}$

Step 6.3

Replace all occurrences of $z$ in $y = - \frac{13}{4} + \frac{7 z}{4}$ with $3$ .

$y = - \frac{13}{4} + \frac{7 (3)}{4}$

$x = - 1$

$z = 3$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $- \frac{13}{4} + \frac{7 (3)}{4}$ .

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Step 6.4.1.1

Combine the numerators over the common denominator.

$y = \frac{- 13 + 7 (3)}{4}$

$x = - 1$

$z = 3$

Step 6.4.1.2

Simplify the expression.

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Step 6.4.1.2.1

Multiply $7$ by $3$ .

$y = \frac{- 13 + 21}{4}$

$x = - 1$

$z = 3$

Step 6.4.1.2.2

Add $- 13$ and $21$ .

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

$x = - 1$

$z = 3$

Step 6.4.1.2.3

Divide $8$ by $4$ .

$y = 2$

$x = - 1$

$z = 3$

$y = 2$

$x = - 1$

$z = 3$

$y = 2$

$x = - 1$

$z = 3$

$y = 2$

$x = - 1$

$z = 3$

$y = 2$

$x = - 1$

$z = 3$

Step 7

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

$(- 1, 2, 3)$

Step 8

The result can be shown in multiple forms.

Point Form:

$(- 1, 2, 3)$

Equation Form:

$x = - 1, y = 2, z = 3$