Finite Math Examples

$- x - 3 y + z = 19$ , $x + 5 y + 3 z = - 19$ , $- 4 x - 3 y - 4 z = - 2$

Step 1

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

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Step 1.1

Add $x$ to both sides of the equation.

$- 3 y + z = 19 + x$

$x + 5 y + 3 z = - 19$

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

Step 1.2

Add $3 y$ to both sides of the equation.

$z = 19 + x + 3 y$

$x + 5 y + 3 z = - 19$

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

$z = 19 + x + 3 y$

$x + 5 y + 3 z = - 19$

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

Step 2

Replace all occurrences of $z$ with $19 + x + 3 y$ in each equation.

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Step 2.1

Replace all occurrences of $z$ in $x + 5 y + 3 z = - 19$ with $19 + x + 3 y$ .

$x + 5 y + 3 (19 + x + 3 y) = - 19$

$z = 19 + x + 3 y$

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

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $x + 5 y + 3 (19 + x + 3 y)$ .

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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.

$x + 5 y + 3 \cdot 19 + 3 x + 3 (3 y) = - 19$

$z = 19 + x + 3 y$

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

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $3$ by $19$ .

$x + 5 y + 57 + 3 x + 3 (3 y) = - 19$

$z = 19 + x + 3 y$

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

Step 2.2.1.1.2.2

Multiply $3$ by $3$ .

$x + 5 y + 57 + 3 x + 9 y = - 19$

$z = 19 + x + 3 y$

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

$x + 5 y + 57 + 3 x + 9 y = - 19$

$z = 19 + x + 3 y$

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

$x + 5 y + 57 + 3 x + 9 y = - 19$

$z = 19 + x + 3 y$

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

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Add $x$ and $3 x$ .

$4 x + 5 y + 57 + 9 y = - 19$

$z = 19 + x + 3 y$

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

Step 2.2.1.2.2

Add $5 y$ and $9 y$ .

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

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

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

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

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

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

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

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

Step 2.3

Replace all occurrences of $z$ in $- 4 x - 3 y - 4 z = - 2$ with $19 + x + 3 y$ .

$- 4 x - 3 y - 4 (19 + x + 3 y) = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $- 4 x - 3 y - 4 (19 + x + 3 y)$ .

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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.

$- 4 x - 3 y - 4 \cdot 19 - 4 x - 4 (3 y) = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 2.4.1.1.2

Simplify.

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Step 2.4.1.1.2.1

Multiply $- 4$ by $19$ .

$- 4 x - 3 y - 76 - 4 x - 4 (3 y) = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 2.4.1.1.2.2

Multiply $3$ by $- 4$ .

$- 4 x - 3 y - 76 - 4 x - 12 y = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 4 x - 3 y - 76 - 4 x - 12 y = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 4 x - 3 y - 76 - 4 x - 12 y = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 2.4.1.2

Simplify by adding terms.

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Step 2.4.1.2.1

Subtract $4 x$ from $- 4 x$ .

$- 8 x - 3 y - 76 - 12 y = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 2.4.1.2.2

Subtract $12 y$ from $- 3 y$ .

$- 8 x - 15 y - 76 = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 8 x - 15 y - 76 = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 8 x - 15 y - 76 = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 8 x - 15 y - 76 = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 8 x - 15 y - 76 = - 2$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3

Solve for $x$ in $- 8 x - 15 y - 76 = - 2$ .

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Step 3.1

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

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Step 3.1.1

Add $15 y$ to both sides of the equation.

$- 8 x - 76 = - 2 + 15 y$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.1.2

Add $76$ to both sides of the equation.

$- 8 x = - 2 + 15 y + 76$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.1.3

Add $- 2$ and $76$ .

$- 8 x = 15 y + 74$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$- 8 x = 15 y + 74$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2

Divide each term in $- 8 x = 15 y + 74$ by $- 8$ and simplify.

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Step 3.2.1

Divide each term in $- 8 x = 15 y + 74$ by $- 8$ .

$\frac{- 8 x}{- 8} = \frac{15 y}{- 8} + \frac{74}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

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.

$\frac{- 8 x}{- 8} = \frac{15 y}{- 8} + \frac{74}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{15 y}{- 8} + \frac{74}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = \frac{15 y}{- 8} + \frac{74}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = \frac{15 y}{- 8} + \frac{74}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

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

Move the negative in front of the fraction.

$x = - \frac{15 y}{8} + \frac{74}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2.3.1.2

Cancel the common factor of $74$ and $- 8$ .

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Step 3.2.3.1.2.1

Factor $2$ out of $74$ .

$x = - \frac{15 y}{8} + \frac{2 (37)}{- 8}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2.3.1.2.2

Cancel the common factors.

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Step 3.2.3.1.2.2.1

Factor $2$ out of $- 8$ .

$x = - \frac{15 y}{8} + \frac{2 \cdot 37}{2 \cdot - 4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2.3.1.2.2.2

Cancel the common factor.

$x = - \frac{15 y}{8} + \frac{2 \cdot 37}{2 \cdot - 4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2.3.1.2.2.3

Rewrite the expression.

$x = - \frac{15 y}{8} + \frac{37}{- 4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = - \frac{15 y}{8} + \frac{37}{- 4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = - \frac{15 y}{8} + \frac{37}{- 4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 3.2.3.1.3

Move the negative in front of the fraction.

$x = - \frac{15 y}{8} - \frac{37}{4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$4 x + 14 y + 57 = - 19$

$z = 19 + x + 3 y$

Step 4

Replace all occurrences of $x$ with $- \frac{15 y}{8} - \frac{37}{4}$ in each equation.

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Step 4.1

Replace all occurrences of $x$ in $4 x + 14 y + 57 = - 19$ with $- \frac{15 y}{8} - \frac{37}{4}$ .

$4 (- \frac{15 y}{8} - \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $4 (- \frac{15 y}{8} - \frac{37}{4}) + 14 y + 57$ .

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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.

$4 (- \frac{15 y}{8}) + 4 (- \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.2

Cancel the common factor of $4$ .

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Step 4.2.1.1.2.1

Move the leading negative in $- \frac{15 y}{8}$ into the numerator.

$4 (\frac{- 15 y}{8}) + 4 (- \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.2.2

Factor $4$ out of $8$ .

$4 (\frac{- 15 y}{4 (2)}) + 4 (- \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.2.3

Cancel the common factor.

$4 (\frac{- 15 y}{4 \cdot 2}) + 4 (- \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.2.4

Rewrite the expression.

$\frac{- 15 y}{2} + 4 (- \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{- 15 y}{2} + 4 (- \frac{37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.3

Cancel the common factor of $4$ .

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Step 4.2.1.1.3.1

Move the leading negative in $- \frac{37}{4}$ into the numerator.

$\frac{- 15 y}{2} + 4 (\frac{- 37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.3.2

Cancel the common factor.

$\frac{- 15 y}{2} + 4 (\frac{- 37}{4}) + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.3.3

Rewrite the expression.

$\frac{- 15 y}{2} - 37 + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{- 15 y}{2} - 37 + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.1.4

Move the negative in front of the fraction.

$- \frac{15 y}{2} - 37 + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$- \frac{15 y}{2} - 37 + 14 y + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.2

To write $14 y$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$- \frac{15 y}{2} + 14 y \cdot \frac{2}{2} - 37 + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.3

Combine $14 y$ and $\frac{2}{2}$ .

$- \frac{15 y}{2} + \frac{14 y \cdot 2}{2} - 37 + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.4

Combine the numerators over the common denominator.

$\frac{- 15 y + 14 y \cdot 2}{2} - 37 + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.5

Find the common denominator.

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Step 4.2.1.5.1

Write $- 37$ as a fraction with denominator $1$ .

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37}{1} + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.5.2

Multiply $\frac{- 37}{1}$ by $\frac{2}{2}$ .

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37}{1} \cdot \frac{2}{2} + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.5.3

Multiply $\frac{- 37}{1}$ by $\frac{2}{2}$ .

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37 \cdot 2}{2} + 57 = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.5.4

Write $57$ as a fraction with denominator $1$ .

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37 \cdot 2}{2} + \frac{57}{1} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.5.5

Multiply $\frac{57}{1}$ by $\frac{2}{2}$ .

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37 \cdot 2}{2} + \frac{57}{1} \cdot \frac{2}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.5.6

Multiply $\frac{57}{1}$ by $\frac{2}{2}$ .

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37 \cdot 2}{2} + \frac{57 \cdot 2}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{- 15 y + 14 y \cdot 2}{2} + \frac{- 37 \cdot 2}{2} + \frac{57 \cdot 2}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.6

Combine the numerators over the common denominator.

$\frac{- 15 y + 14 y \cdot 2 - 37 \cdot 2 + 57 \cdot 2}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.7

Simplify each term.

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Step 4.2.1.7.1

Multiply $2$ by $14$ .

$\frac{- 15 y + 28 y - 37 \cdot 2 + 57 \cdot 2}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.7.2

Multiply $- 37$ by $2$ .

$\frac{- 15 y + 28 y - 74 + 57 \cdot 2}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.7.3

Multiply $57$ by $2$ .

$\frac{- 15 y + 28 y - 74 + 114}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{- 15 y + 28 y - 74 + 114}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.8

Simplify by adding terms.

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Step 4.2.1.8.1

Add $- 15 y$ and $28 y$ .

$\frac{13 y - 74 + 114}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.2.1.8.2

Add $- 74$ and $114$ .

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 + x + 3 y$

Step 4.3

Replace all occurrences of $x$ in $z = 19 + x + 3 y$ with $- \frac{15 y}{8} - \frac{37}{4}$ .

$z = 19 - \frac{15 y}{8} - \frac{37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4

Simplify $z = 19 - \frac{15 y}{8} - \frac{37}{4} + 3 y$ .

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Step 4.4.1

Simplify the left side.

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Step 4.4.1.1

Remove parentheses.

$z = 19 - \frac{15 y}{8} - \frac{37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 19 - \frac{15 y}{8} - \frac{37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2

Simplify the right side.

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Step 4.4.2.1

Simplify $19 - \frac{15 y}{8} - \frac{37}{4} + 3 y$ .

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Step 4.4.2.1.1

To write $19$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$z = - \frac{15 y}{8} + 19 \cdot \frac{4}{4} - \frac{37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.2

Combine $19$ and $\frac{4}{4}$ .

$z = - \frac{15 y}{8} + \frac{19 \cdot 4}{4} - \frac{37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.3

Combine the numerators over the common denominator.

$z = - \frac{15 y}{8} + \frac{19 \cdot 4 - 37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.4

Simplify the numerator.

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Step 4.4.2.1.4.1

Multiply $19$ by $4$ .

$z = - \frac{15 y}{8} + \frac{76 - 37}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.4.2

Subtract $37$ from $76$ .

$z = - \frac{15 y}{8} + \frac{39}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = - \frac{15 y}{8} + \frac{39}{4} + 3 y$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.5

To write $3 y$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$z = - \frac{15 y}{8} + 3 y \cdot \frac{8}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.6

Simplify terms.

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Step 4.4.2.1.6.1

Combine $3 y$ and $\frac{8}{8}$ .

$z = - \frac{15 y}{8} + \frac{3 y \cdot 8}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.6.2

Combine the numerators over the common denominator.

$z = \frac{- 15 y + 3 y \cdot 8}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{- 15 y + 3 y \cdot 8}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.7

Simplify the numerator.

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Step 4.4.2.1.7.1

Factor $3 y$ out of $- 15 y + 3 y \cdot 8$ .

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Step 4.4.2.1.7.1.1

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

$z = \frac{3 y (- 5) + 3 y \cdot 8}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.7.1.2

Factor $3 y$ out of $3 y \cdot 8$ .

$z = \frac{3 y (- 5) + 3 y (8)}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.7.1.3

Factor $3 y$ out of $3 y (- 5) + 3 y (8)$ .

$z = \frac{3 y (- 5 + 8)}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{3 y (- 5 + 8)}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.7.2

Add $- 5$ and $8$ .

$z = \frac{3 y \cdot 3}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 4.4.2.1.7.3

Multiply $3$ by $3$ .

$z = \frac{9 y}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$\frac{13 y + 40}{2} = - 19$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5

Solve for $y$ in $\frac{13 y + 40}{2} = - 19$ .

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Step 5.1

Multiply both sides by $2$ .

$\frac{13 y + 40}{2} \cdot 2 = - 19 \cdot 2$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

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

Cancel the common factor of $2$ .

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Step 5.2.1.1.1

Cancel the common factor.

$\frac{13 y + 40}{2} \cdot 2 = - 19 \cdot 2$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.2.1.1.2

Rewrite the expression.

$13 y + 40 = - 19 \cdot 2$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$13 y + 40 = - 19 \cdot 2$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$13 y + 40 = - 19 \cdot 2$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.2.2

Simplify the right side.

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Step 5.2.2.1

Multiply $- 19$ by $2$ .

$13 y + 40 = - 38$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$13 y + 40 = - 38$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$13 y + 40 = - 38$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.3

Solve for $y$ .

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Step 5.3.1

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

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Step 5.3.1.1

Subtract $40$ from both sides of the equation.

$13 y = - 38 - 40$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.3.1.2

Subtract $40$ from $- 38$ .

$13 y = - 78$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$13 y = - 78$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.3.2

Divide each term in $13 y = - 78$ by $13$ and simplify.

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Step 5.3.2.1

Divide each term in $13 y = - 78$ by $13$ .

$\frac{13 y}{13} = \frac{- 78}{13}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.3.2.2

Simplify the left side.

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Step 5.3.2.2.1

Cancel the common factor of $13$ .

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Step 5.3.2.2.1.1

Cancel the common factor.

$\frac{13 y}{13} = \frac{- 78}{13}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.3.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{- 78}{13}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$y = \frac{- 78}{13}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$y = \frac{- 78}{13}$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 5.3.2.3

Simplify the right side.

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Step 5.3.2.3.1

Divide $- 78$ by $13$ .

$y = - 6$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$y = - 6$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$y = - 6$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$y = - 6$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$y = - 6$

$z = \frac{9 y}{8} + \frac{39}{4}$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6

Replace all occurrences of $y$ with $- 6$ in each equation.

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Step 6.1

Replace all occurrences of $y$ in $z = \frac{9 y}{8} + \frac{39}{4}$ with $- 6$ .

$z = \frac{9 (- 6)}{8} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $\frac{9 (- 6)}{8} + \frac{39}{4}$ .

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Step 6.2.1.1

Multiply $9$ by $- 6$ .

$z = \frac{- 54}{8} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.2

Simplify each term.

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Step 6.2.1.2.1

Cancel the common factor of $- 54$ and $8$ .

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Step 6.2.1.2.1.1

Factor $2$ out of $- 54$ .

$z = \frac{2 (- 27)}{8} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.2.1.2

Cancel the common factors.

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Step 6.2.1.2.1.2.1

Factor $2$ out of $8$ .

$z = \frac{2 \cdot - 27}{2 \cdot 4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.2.1.2.2

Cancel the common factor.

$z = \frac{2 \cdot - 27}{2 \cdot 4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.2.1.2.3

Rewrite the expression.

$z = \frac{- 27}{4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{- 27}{4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = \frac{- 27}{4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.2.2

Move the negative in front of the fraction.

$z = - \frac{27}{4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = - \frac{27}{4} + \frac{39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.3

Combine fractions.

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Step 6.2.1.3.1

Combine the numerators over the common denominator.

$z = \frac{- 27 + 39}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.3.2

Simplify the expression.

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Step 6.2.1.3.2.1

Add $- 27$ and $39$ .

$z = \frac{12}{4}$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.2.1.3.2.2

Divide $12$ by $4$ .

$z = 3$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = - \frac{15 y}{8} - \frac{37}{4}$

Step 6.3

Replace all occurrences of $y$ in $x = - \frac{15 y}{8} - \frac{37}{4}$ with $- 6$ .

$x = - \frac{15 (- 6)}{8} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $- \frac{15 (- 6)}{8} - \frac{37}{4}$ .

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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 $- 6$ and $8$ .

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Step 6.4.1.1.1.1

Factor $2$ out of $15 (- 6)$ .

$x = - \frac{2 (15 \cdot (- 3))}{8} - \frac{37}{4}$

$z = 3$

$y = - 6$

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 $8$ .

$x = - \frac{2 (15 \cdot (- 3))}{2 (4)} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.1.1.2.2

Cancel the common factor.

$x = - \frac{2 (15 \cdot (- 3))}{2 \cdot 4} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.1.1.2.3

Rewrite the expression.

$x = - \frac{15 \cdot (- 3)}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = - \frac{15 \cdot (- 3)}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = - \frac{15 \cdot (- 3)}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.1.2

Multiply $15$ by $- 3$ .

$x = - \frac{- 45}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.1.3

Move the negative in front of the fraction.

$x = \frac{45}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.1.4

Multiply $- - \frac{45}{4}$ .

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Step 6.4.1.1.4.1

Multiply $- 1$ by $- 1$ .

$x = 1 (\frac{45}{4}) - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.1.4.2

Multiply $\frac{45}{4}$ by $1$ .

$x = \frac{45}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = \frac{45}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

$x = \frac{45}{4} - \frac{37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.2

Combine fractions.

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Step 6.4.1.2.1

Combine the numerators over the common denominator.

$x = \frac{45 - 37}{4}$

$z = 3$

$y = - 6$

Step 6.4.1.2.2

Simplify the expression.

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Step 6.4.1.2.2.1

Subtract $37$ from $45$ .

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

$z = 3$

$y = - 6$

Step 6.4.1.2.2.2

Divide $8$ by $4$ .

$x = 2$

$z = 3$

$y = - 6$

$x = 2$

$z = 3$

$y = - 6$

$x = 2$

$z = 3$

$y = - 6$

$x = 2$

$z = 3$

$y = - 6$

$x = 2$

$z = 3$

$y = - 6$

$x = 2$

$z = 3$

$y = - 6$

Step 7

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

$(2, - 6, 3)$

Step 8

The result can be shown in multiple forms.

Point Form:

$(2, - 6, 3)$

Equation Form:

$x = 2, y = - 6, z = 3$