Precalculus Examples

$5 x - 7 z = 32$ , $7 x - 2 y + 4 z = 38$ , $2 x + 2 y = - 80$

Step 1

Solve for $x$ in $5 x - 7 z = 32$ .

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Step 1.1

Add $7 z$ to both sides of the equation.

$5 x = 32 + 7 z$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

Step 1.2

Divide each term in $5 x = 32 + 7 z$ by $5$ and simplify.

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Step 1.2.1

Divide each term in $5 x = 32 + 7 z$ by $5$ .

$\frac{5 x}{5} = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

Step 1.2.2

Simplify the left side.

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Step 1.2.2.1

Cancel the common factor of $5$ .

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Step 1.2.2.1.1

Cancel the common factor.

$\frac{5 x}{5} = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

Step 1.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

$x = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

$x = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

$x = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

$x = \frac{32}{5} + \frac{7 z}{5}$

$7 x - 2 y + 4 z = 38$

$2 x + 2 y = - 80$

Step 2

Replace all occurrences of $x$ with $\frac{32}{5} + \frac{7 z}{5}$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $7 x - 2 y + 4 z = 38$ with $\frac{32}{5} + \frac{7 z}{5}$ .

$7 (\frac{32}{5} + \frac{7 z}{5}) - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $7 (\frac{32}{5} + \frac{7 z}{5}) - 2 y + 4 z$ .

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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.

$7 (\frac{32}{5}) + 7 (\frac{7 z}{5}) - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.1.2

Multiply $7 (\frac{32}{5})$ .

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Step 2.2.1.1.2.1

Combine $7$ and $\frac{32}{5}$ .

$\frac{7 \cdot 32}{5} + 7 (\frac{7 z}{5}) - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.1.2.2

Multiply $7$ by $32$ .

$\frac{224}{5} + 7 (\frac{7 z}{5}) - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

$\frac{224}{5} + 7 (\frac{7 z}{5}) - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.1.3

Multiply $7 \frac{7 z}{5}$ .

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Step 2.2.1.1.3.1

Combine $7$ and $\frac{7 z}{5}$ .

$\frac{224}{5} + \frac{7 (7 z)}{5} - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.1.3.2

Multiply $7$ by $7$ .

$\frac{224}{5} + \frac{49 z}{5} - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

$\frac{224}{5} + \frac{49 z}{5} - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

$\frac{224}{5} + \frac{49 z}{5} - 2 y + 4 z = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.2

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

$\frac{224}{5} - 2 y + \frac{49 z}{5} + 4 z \cdot \frac{5}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.3

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

$\frac{224}{5} - 2 y + \frac{49 z}{5} + \frac{4 z \cdot 5}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.4

Combine the numerators over the common denominator.

$\frac{224}{5} - 2 y + \frac{49 z + 4 z \cdot 5}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.5

Combine the numerators over the common denominator.

$- 2 y + \frac{224 + 49 z + 4 z \cdot 5}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.6

Multiply $5$ by $4$ .

$- 2 y + \frac{224 + 49 z + 20 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.7

Add $49 z$ and $20 z$ .

$- 2 y + \frac{224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.8

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

$- 2 y \cdot \frac{5}{5} + \frac{224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.9

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

$\frac{- 2 y \cdot 5}{5} + \frac{224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.10

Combine the numerators over the common denominator.

$\frac{- 2 y \cdot 5 + 224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.11

Multiply $5$ by $- 2$ .

$\frac{- 10 y + 224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.12

Factor $- 1$ out of $- 10 y$ .

$\frac{- (10 y) + 224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.13

Rewrite $224$ as $- 1 (- 224)$ .

$\frac{- (10 y) - 1 \cdot - 224 + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.14

Factor $- 1$ out of $- (10 y) - 1 (- 224)$ .

$\frac{- (10 y - 224) + 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.15

Factor $- 1$ out of $69 z$ .

$\frac{- (10 y - 224) - (- 69 z)}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.16

Factor $- 1$ out of $- (10 y - 224) - (- 69 z)$ .

$\frac{- (10 y - 224 - 69 z)}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.17

Simplify the expression.

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Step 2.2.1.17.1

Rewrite $- (10 y - 224 - 69 z)$ as $- 1 (10 y - 224 - 69 z)$ .

$\frac{- 1 (10 y - 224 - 69 z)}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.2.1.17.2

Move the negative in front of the fraction.

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$2 x + 2 y = - 80$

Step 2.3

Replace all occurrences of $x$ in $2 x + 2 y = - 80$ with $\frac{32}{5} + \frac{7 z}{5}$ .

$2 (\frac{32}{5} + \frac{7 z}{5}) + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify each term.

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Step 2.4.1.1

Apply the distributive property.

$2 (\frac{32}{5}) + 2 (\frac{7 z}{5}) + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

Step 2.4.1.2

Multiply $2 (\frac{32}{5})$ .

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Step 2.4.1.2.1

Combine $2$ and $\frac{32}{5}$ .

$\frac{2 \cdot 32}{5} + 2 (\frac{7 z}{5}) + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

Step 2.4.1.2.2

Multiply $2$ by $32$ .

$\frac{64}{5} + 2 (\frac{7 z}{5}) + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$\frac{64}{5} + 2 (\frac{7 z}{5}) + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

Step 2.4.1.3

Multiply $2 \frac{7 z}{5}$ .

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Step 2.4.1.3.1

Combine $2$ and $\frac{7 z}{5}$ .

$\frac{64}{5} + \frac{2 (7 z)}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

Step 2.4.1.3.2

Multiply $7$ by $2$ .

$\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

$\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$x = \frac{32}{5} + \frac{7 z}{5}$

Step 3

Reorder $\frac{32}{5}$ and $\frac{7 z}{5}$ .

$x = \frac{7 z}{5} + \frac{32}{5}$

$\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4

Solve for $y$ in $\frac{64}{5} + \frac{14 z}{5} + 2 y = - 80$ .

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Step 4.1

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

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Step 4.1.1

Subtract $\frac{64}{5}$ from both sides of the equation.

$\frac{14 z}{5} + 2 y = - 80 - \frac{64}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.2

Subtract $\frac{14 z}{5}$ from both sides of the equation.

$2 y = - 80 - \frac{64}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.3

To write $- 80$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$2 y = - 80 \cdot \frac{5}{5} - \frac{64}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.4

Combine $- 80$ and $\frac{5}{5}$ .

$2 y = \frac{- 80 \cdot 5}{5} - \frac{64}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.5

Combine the numerators over the common denominator.

$2 y = \frac{- 80 \cdot 5 - 64}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.6

Simplify the numerator.

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Step 4.1.6.1

Multiply $- 80$ by $5$ .

$2 y = \frac{- 400 - 64}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.6.2

Subtract $64$ from $- 400$ .

$2 y = \frac{- 464}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$2 y = \frac{- 464}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.1.7

Move the negative in front of the fraction.

$2 y = - \frac{464}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$2 y = - \frac{464}{5} - \frac{14 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2

Divide each term in $2 y = - \frac{464}{5} - \frac{14 z}{5}$ by $2$ and simplify.

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Step 4.2.1

Divide each term in $2 y = - \frac{464}{5} - \frac{14 z}{5}$ by $2$ .

$\frac{2 y}{2} = \frac{- \frac{464}{5}}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.2

Simplify the left side.

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Step 4.2.2.1

Cancel the common factor of $2$ .

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Step 4.2.2.1.1

Cancel the common factor.

$\frac{2 y}{2} = \frac{- \frac{464}{5}}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{- \frac{464}{5}}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = \frac{- \frac{464}{5}}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = \frac{- \frac{464}{5}}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3

Simplify the right side.

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Step 4.2.3.1

Simplify each term.

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Step 4.2.3.1.1

Multiply the numerator by the reciprocal of the denominator.

$y = - \frac{464}{5} \cdot \frac{1}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.2

Cancel the common factor of $2$ .

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Step 4.2.3.1.2.1

Move the leading negative in $- \frac{464}{5}$ into the numerator.

$y = \frac{- 464}{5} \cdot \frac{1}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.2.2

Factor $2$ out of $- 464$ .

$y = \frac{2 (- 232)}{5} \cdot \frac{1}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.2.3

Cancel the common factor.

$y = \frac{2 \cdot - 232}{5} \cdot \frac{1}{2} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.2.4

Rewrite the expression.

$y = \frac{- 232}{5} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = \frac{- 232}{5} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.3

Move the negative in front of the fraction.

$y = - \frac{232}{5} + \frac{- \frac{14 z}{5}}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.4

Multiply the numerator by the reciprocal of the denominator.

$y = - \frac{232}{5} - \frac{14 z}{5} \cdot \frac{1}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.5

Cancel the common factor of $2$ .

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Step 4.2.3.1.5.1

Move the leading negative in $- \frac{14 z}{5}$ into the numerator.

$y = - \frac{232}{5} + \frac{- 14 z}{5} \cdot \frac{1}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.5.2

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

$y = - \frac{232}{5} + \frac{2 (- 7 z)}{5} \cdot \frac{1}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.5.3

Cancel the common factor.

$y = - \frac{232}{5} + \frac{2 (- 7 z)}{5} \cdot \frac{1}{2}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.5.4

Rewrite the expression.

$y = - \frac{232}{5} + \frac{- 7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} + \frac{- 7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 4.2.3.1.6

Move the negative in front of the fraction.

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{10 y - 224 - 69 z}{5} = 38$

Step 5

Replace all occurrences of $y$ with $- \frac{232}{5} - \frac{7 z}{5}$ in each equation.

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Step 5.1

Replace all occurrences of $y$ in $- \frac{10 y - 224 - 69 z}{5} = 38$ with $- \frac{232}{5} - \frac{7 z}{5}$ .

$- \frac{10 (- \frac{232}{5} - \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2

Simplify the left side.

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Step 5.2.1

Simplify $- \frac{10 (- \frac{232}{5} - \frac{7 z}{5}) - 224 - 69 z}{5}$ .

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Step 5.2.1.1

Simplify the numerator.

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Step 5.2.1.1.1

Apply the distributive property.

$- \frac{10 (- \frac{232}{5}) + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.2

Cancel the common factor of $5$ .

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Step 5.2.1.1.2.1

Move the leading negative in $- \frac{232}{5}$ into the numerator.

$- \frac{10 (\frac{- 232}{5}) + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.2.2

Factor $5$ out of $10$ .

$- \frac{5 (2) (\frac{- 232}{5}) + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.2.3

Cancel the common factor.

$- \frac{5 \cdot (2 (\frac{- 232}{5})) + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.2.4

Rewrite the expression.

$- \frac{2 \cdot - 232 + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{2 \cdot - 232 + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.3

Multiply $2$ by $- 232$ .

$- \frac{- 464 + 10 (- \frac{7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.4

Cancel the common factor of $5$ .

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Step 5.2.1.1.4.1

Move the leading negative in $- \frac{7 z}{5}$ into the numerator.

$- \frac{- 464 + 10 (\frac{- 7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.4.2

Factor $5$ out of $10$ .

$- \frac{- 464 + 5 (2) (\frac{- 7 z}{5}) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.4.3

Cancel the common factor.

$- \frac{- 464 + 5 \cdot (2 (\frac{- 7 z}{5})) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.4.4

Rewrite the expression.

$- \frac{- 464 + 2 (- 7 z) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{- 464 + 2 (- 7 z) - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.5

Multiply $- 7$ by $2$ .

$- \frac{- 464 - 14 z - 224 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.6

Subtract $224$ from $- 464$ .

$- \frac{- 14 z - 688 - 69 z}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.1.7

Subtract $69 z$ from $- 14 z$ .

$- \frac{- 83 z - 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$- \frac{- 83 z - 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2

Simplify with factoring out.

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Step 5.2.1.2.1

Factor $- 1$ out of $- 83 z$ .

$- \frac{- (83 z) - 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2.2

Rewrite $- 688$ as $- 1 (688)$ .

$- \frac{- (83 z) - 1 \cdot 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2.3

Factor $- 1$ out of $- (83 z) - 1 (688)$ .

$- \frac{- (83 z + 688)}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2.4

Simplify the expression.

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Step 5.2.1.2.4.1

Rewrite $- (83 z + 688)$ as $- 1 (83 z + 688)$ .

$- \frac{- 1 (83 z + 688)}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2.4.2

Move the negative in front of the fraction.

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2.4.3

Multiply $- 1$ by $- 1$ .

$1 (\frac{83 z + 688}{5}) = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 5.2.1.2.4.4

Multiply $\frac{83 z + 688}{5}$ by $1$ .

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$\frac{83 z + 688}{5} = 38$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6

Solve for $z$ in $\frac{83 z + 688}{5} = 38$ .

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Step 6.1

Multiply both sides by $5$ .

$\frac{83 z + 688}{5} \cdot 5 = 38 \cdot 5$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.2

Simplify.

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Step 6.2.1

Simplify the left side.

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Step 6.2.1.1

Cancel the common factor of $5$ .

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Step 6.2.1.1.1

Cancel the common factor.

$\frac{83 z + 688}{5} \cdot 5 = 38 \cdot 5$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.2.1.1.2

Rewrite the expression.

$83 z + 688 = 38 \cdot 5$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$83 z + 688 = 38 \cdot 5$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$83 z + 688 = 38 \cdot 5$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.2.2

Simplify the right side.

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Step 6.2.2.1

Multiply $38$ by $5$ .

$83 z + 688 = 190$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$83 z + 688 = 190$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$83 z + 688 = 190$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.3

Solve for $z$ .

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Step 6.3.1

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

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Step 6.3.1.1

Subtract $688$ from both sides of the equation.

$83 z = 190 - 688$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.3.1.2

Subtract $688$ from $190$ .

$83 z = - 498$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$83 z = - 498$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.3.2

Divide each term in $83 z = - 498$ by $83$ and simplify.

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Step 6.3.2.1

Divide each term in $83 z = - 498$ by $83$ .

$\frac{83 z}{83} = \frac{- 498}{83}$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.3.2.2

Simplify the left side.

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Step 6.3.2.2.1

Cancel the common factor of $83$ .

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Step 6.3.2.2.1.1

Cancel the common factor.

$\frac{83 z}{83} = \frac{- 498}{83}$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.3.2.2.1.2

Divide $z$ by $1$ .

$z = \frac{- 498}{83}$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$z = \frac{- 498}{83}$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$z = \frac{- 498}{83}$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 6.3.2.3

Simplify the right side.

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Step 6.3.2.3.1

Divide $- 498$ by $83$ .

$z = - 6$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$z = - 6$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$z = - 6$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$z = - 6$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

$z = - 6$

$y = - \frac{232}{5} - \frac{7 z}{5}$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 7

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

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Step 7.1

Replace all occurrences of $z$ in $y = - \frac{232}{5} - \frac{7 z}{5}$ with $- 6$ .

$y = - \frac{232}{5} - \frac{7 (- 6)}{5}$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 7.2

Simplify the right side.

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Step 7.2.1

Simplify $- \frac{232}{5} - \frac{7 (- 6)}{5}$ .

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Step 7.2.1.1

Combine the numerators over the common denominator.

$y = \frac{- 232 - 7 \cdot - 6}{5}$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 7.2.1.2

Simplify the expression.

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Step 7.2.1.2.1

Multiply $- 7$ by $- 6$ .

$y = \frac{- 232 + 42}{5}$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 7.2.1.2.2

Add $- 232$ and $42$ .

$y = \frac{- 190}{5}$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 7.2.1.2.3

Divide $- 190$ by $5$ .

$y = - 38$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

$y = - 38$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

$y = - 38$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

$y = - 38$

$z = - 6$

$x = \frac{7 z}{5} + \frac{32}{5}$

Step 7.3

Replace all occurrences of $z$ in $x = \frac{7 z}{5} + \frac{32}{5}$ with $- 6$ .

$x = \frac{7 (- 6)}{5} + \frac{32}{5}$

$y = - 38$

$z = - 6$

Step 7.4

Simplify the right side.

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Step 7.4.1

Simplify $\frac{7 (- 6)}{5} + \frac{32}{5}$ .

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Step 7.4.1.1

Combine the numerators over the common denominator.

$x = \frac{7 (- 6) + 32}{5}$

$y = - 38$

$z = - 6$

Step 7.4.1.2

Simplify the expression.

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Step 7.4.1.2.1

Multiply $7$ by $- 6$ .

$x = \frac{- 42 + 32}{5}$

$y = - 38$

$z = - 6$

Step 7.4.1.2.2

Add $- 42$ and $32$ .

$x = \frac{- 10}{5}$

$y = - 38$

$z = - 6$

Step 7.4.1.2.3

Divide $- 10$ by $5$ .

$x = - 2$

$y = - 38$

$z = - 6$

$x = - 2$

$y = - 38$

$z = - 6$

$x = - 2$

$y = - 38$

$z = - 6$

$x = - 2$

$y = - 38$

$z = - 6$

$x = - 2$

$y = - 38$

$z = - 6$

Step 8

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

$(- 2, - 38, - 6)$

Step 9

The result can be shown in multiple forms.

Point Form:

$(- 2, - 38, - 6)$

Equation Form:

$x = - 2, y = - 38, z = - 6$