Finite Math Examples

$x - y + 4 z = - 22$ , $3 x + z = 5$ , $x + 5 y + z = 5$

Step 1

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

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Step 1.1

Add $y$ to both sides of the equation.

$x + 4 z = - 22 + y$

$3 x + z = 5$

$x + 5 y + z = 5$

Step 1.2

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

$x = - 22 + y - 4 z$

$3 x + z = 5$

$x + 5 y + z = 5$

$x = - 22 + y - 4 z$

$3 x + z = 5$

$x + 5 y + z = 5$

Step 2

Replace all occurrences of $x$ with $- 22 + y - 4 z$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $3 x + z = 5$ with $- 22 + y - 4 z$ .

$3 (- 22 + y - 4 z) + z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $3 (- 22 + y - 4 z) + z$ .

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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.

$3 \cdot - 22 + 3 y + 3 (- 4 z) + z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $3$ by $- 22$ .

$- 66 + 3 y + 3 (- 4 z) + z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

Step 2.2.1.1.2.2

Multiply $- 4$ by $3$ .

$- 66 + 3 y - 12 z + z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

$- 66 + 3 y - 12 z + z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

$- 66 + 3 y - 12 z + z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

Step 2.2.1.2

Add $- 12 z$ and $z$ .

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$x + 5 y + z = 5$

Step 2.3

Replace all occurrences of $x$ in $x + 5 y + z = 5$ with $- 22 + y - 4 z$ .

$(- 22 + y - 4 z) + 5 y + z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $(- 22 + y - 4 z) + 5 y + z$ .

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Step 2.4.1.1

Add $y$ and $5 y$ .

$- 22 + 6 y - 4 z + z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 2.4.1.2

Add $- 4 z$ and $z$ .

$- 22 + 6 y - 3 z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$- 22 + 6 y - 3 z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$- 22 + 6 y - 3 z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$- 22 + 6 y - 3 z = 5$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3

Solve for $y$ in $- 22 + 6 y - 3 z = 5$ .

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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 $22$ to both sides of the equation.

$6 y - 3 z = 5 + 22$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.1.2

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

$6 y = 5 + 22 + 3 z$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.1.3

Add $5$ and $22$ .

$6 y = 27 + 3 z$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$6 y = 27 + 3 z$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2

Divide each term in $6 y = 27 + 3 z$ by $6$ and simplify.

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Step 3.2.1

Divide each term in $6 y = 27 + 3 z$ by $6$ .

$\frac{6 y}{6} = \frac{27}{6} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.2

Simplify the left side.

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Step 3.2.2.1

Cancel the common factor of $6$ .

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Step 3.2.2.1.1

Cancel the common factor.

$\frac{6 y}{6} = \frac{27}{6} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{27}{6} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{27}{6} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{27}{6} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

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 $27$ and $6$ .

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Step 3.2.3.1.1.1

Factor $3$ out of $27$ .

$y = \frac{3 (9)}{6} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.1.2

Cancel the common factors.

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Step 3.2.3.1.1.2.1

Factor $3$ out of $6$ .

$y = \frac{3 \cdot 9}{3 \cdot 2} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.1.2.2

Cancel the common factor.

$y = \frac{3 \cdot 9}{3 \cdot 2} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.1.2.3

Rewrite the expression.

$y = \frac{9}{2} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{3 z}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.2

Cancel the common factor of $3$ and $6$ .

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Step 3.2.3.1.2.1

Factor $3$ out of $3 z$ .

$y = \frac{9}{2} + \frac{3 (z)}{6}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.2.2

Cancel the common factors.

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Step 3.2.3.1.2.2.1

Factor $3$ out of $6$ .

$y = \frac{9}{2} + \frac{3 z}{3 \cdot 2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.2.2.2

Cancel the common factor.

$y = \frac{9}{2} + \frac{3 z}{3 \cdot 2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 3.2.3.1.2.2.3

Rewrite the expression.

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

$y = \frac{9}{2} + \frac{z}{2}$

$- 66 + 3 y - 11 z = 5$

$x = - 22 + y - 4 z$

Step 4

Replace all occurrences of $y$ with $\frac{9}{2} + \frac{z}{2}$ in each equation.

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Step 4.1

Replace all occurrences of $y$ in $- 66 + 3 y - 11 z = 5$ with $\frac{9}{2} + \frac{z}{2}$ .

$- 66 + 3 (\frac{9}{2} + \frac{z}{2}) - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $- 66 + 3 (\frac{9}{2} + \frac{z}{2}) - 11 z$ .

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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.

$- 66 + 3 (\frac{9}{2}) + 3 (\frac{z}{2}) - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.1.2

Multiply $3 (\frac{9}{2})$ .

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Step 4.2.1.1.2.1

Combine $3$ and $\frac{9}{2}$ .

$- 66 + \frac{3 \cdot 9}{2} + 3 (\frac{z}{2}) - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.1.2.2

Multiply $3$ by $9$ .

$- 66 + \frac{27}{2} + 3 (\frac{z}{2}) - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

$- 66 + \frac{27}{2} + 3 (\frac{z}{2}) - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.1.3

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

$- 66 + \frac{27}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

$- 66 + \frac{27}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.2

To write $- 66$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$- 66 \cdot \frac{2}{2} + \frac{27}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.3

Combine $- 66$ and $\frac{2}{2}$ .

$\frac{- 66 \cdot 2}{2} + \frac{27}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.4

Combine the numerators over the common denominator.

$\frac{- 66 \cdot 2 + 27}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.5

Simplify the numerator.

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Step 4.2.1.5.1

Multiply $- 66$ by $2$ .

$\frac{- 132 + 27}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.5.2

Add $- 132$ and $27$ .

$\frac{- 105}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

$\frac{- 105}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.6

Move the negative in front of the fraction.

$- \frac{105}{2} + \frac{3 z}{2} - 11 z = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.7

To write $- 11 z$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$- \frac{105}{2} + \frac{3 z}{2} - 11 z \cdot \frac{2}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.8

Combine $- 11 z$ and $\frac{2}{2}$ .

$- \frac{105}{2} + \frac{3 z}{2} + \frac{- 11 z \cdot 2}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.9

Combine the numerators over the common denominator.

$- \frac{105}{2} + \frac{3 z - 11 z \cdot 2}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.10

Combine the numerators over the common denominator.

$\frac{- 105 + 3 z - 11 z \cdot 2}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.11

Multiply $2$ by $- 11$ .

$\frac{- 105 + 3 z - 22 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.12

Subtract $22 z$ from $3 z$ .

$\frac{- 105 - 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.13

Rewrite $- 105$ as $- 1 (105)$ .

$\frac{- 1 \cdot 105 - 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.14

Factor $- 1$ out of $- 19 z$ .

$\frac{- 1 \cdot 105 - (19 z)}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.15

Factor $- 1$ out of $- 1 (105) - (19 z)$ .

$\frac{- 1 (105 + 19 z)}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.2.1.16

Move the negative in front of the fraction.

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + y - 4 z$

Step 4.3

Replace all occurrences of $y$ in $x = - 22 + y - 4 z$ with $\frac{9}{2} + \frac{z}{2}$ .

$x = - 22 + \frac{9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4

Simplify $x = - 22 + \frac{9}{2} + \frac{z}{2} - 4 z$ .

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Step 4.4.1

Simplify the left side.

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Step 4.4.1.1

Remove parentheses.

$x = - 22 + \frac{9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - 22 + \frac{9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2

Simplify the right side.

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Step 4.4.2.1

Simplify $- 22 + \frac{9}{2} + \frac{z}{2} - 4 z$ .

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Step 4.4.2.1.1

To write $- 22$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$x = - 22 \cdot \frac{2}{2} + \frac{9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.2

Combine $- 22$ and $\frac{2}{2}$ .

$x = \frac{- 22 \cdot 2}{2} + \frac{9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.3

Combine the numerators over the common denominator.

$x = \frac{- 22 \cdot 2 + 9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.4

Simplify the numerator.

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Step 4.4.2.1.4.1

Multiply $- 22$ by $2$ .

$x = \frac{- 44 + 9}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.4.2

Add $- 44$ and $9$ .

$x = \frac{- 35}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = \frac{- 35}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.5

Move the negative in front of the fraction.

$x = - \frac{35}{2} + \frac{z}{2} - 4 z$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.6

To write $- 4 z$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$x = - \frac{35}{2} + \frac{z}{2} - 4 z \cdot \frac{2}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.7

Combine $- 4 z$ and $\frac{2}{2}$ .

$x = - \frac{35}{2} + \frac{z}{2} + \frac{- 4 z \cdot 2}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.8

Combine the numerators over the common denominator.

$x = - \frac{35}{2} + \frac{z - 4 z \cdot 2}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.9

Combine the numerators over the common denominator.

$x = \frac{- 35 + z - 4 z \cdot 2}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.10

Multiply $2$ by $- 4$ .

$x = \frac{- 35 + z - 8 z}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.11

Subtract $8 z$ from $z$ .

$x = \frac{- 35 - 7 z}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.12

Factor $7$ out of $- 35 - 7 z$ .

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Step 4.4.2.1.12.1

Factor $7$ out of $- 35$ .

$x = \frac{7 (- 5) - 7 z}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.12.2

Factor $7$ out of $- 7 z$ .

$x = \frac{7 (- 5) + 7 (- z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.12.3

Factor $7$ out of $7 (- 5) + 7 (- z)$ .

$x = \frac{7 (- 5 - z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = \frac{7 (- 5 - z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.13

Rewrite $- 5$ as $- 1 (5)$ .

$x = \frac{7 (- 1 \cdot 5 - z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.14

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

$x = \frac{7 (- 1 \cdot 5 - (z))}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.15

Factor $- 1$ out of $- 1 (5) - (z)$ .

$x = \frac{7 (- 1 (5 + z))}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 4.4.2.1.16

Move the negative in front of the fraction.

$x = - \frac{7 (5 + z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{7 (5 + z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{7 (5 + z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{7 (5 + z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{7 (5 + z)}{2}$

$- \frac{105 + 19 z}{2} = 5$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5

Solve for $z$ in $- \frac{105 + 19 z}{2} = 5$ .

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Step 5.1

Multiply both sides of the equation by $- 2$ .

$- 2 (- \frac{105 + 19 z}{2}) = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2

Simplify both sides of the equation.

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Step 5.2.1

Simplify the left side.

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Step 5.2.1.1

Simplify $- 2 (- \frac{105 + 19 z}{2})$ .

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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

Move the leading negative in $- \frac{105 + 19 z}{2}$ into the numerator.

$- 2 \frac{- (105 + 19 z)}{2} = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2.1.1.1.2

Factor $2$ out of $- 2$ .

$2 (- 1) (\frac{- (105 + 19 z)}{2}) = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2.1.1.1.3

Cancel the common factor.

$2 \cdot (- 1 \frac{- (105 + 19 z)}{2}) = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2.1.1.1.4

Rewrite the expression.

$105 + 19 z = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$105 + 19 z = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2.1.1.2

Multiply.

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Step 5.2.1.1.2.1

Multiply $- 1$ by $- 1$ .

$1 (105 + 19 z) = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2.1.1.2.2

Multiply $105 + 19 z$ by $1$ .

$105 + 19 z = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$105 + 19 z = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$105 + 19 z = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$105 + 19 z = - 2 \cdot 5$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.2.2

Simplify the right side.

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Step 5.2.2.1

Multiply $- 2$ by $5$ .

$105 + 19 z = - 10$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$105 + 19 z = - 10$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$105 + 19 z = - 10$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.3

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

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Step 5.3.1

Subtract $105$ from both sides of the equation.

$19 z = - 10 - 105$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.3.2

Subtract $105$ from $- 10$ .

$19 z = - 115$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$19 z = - 115$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.4

Divide each term in $19 z = - 115$ by $19$ and simplify.

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Step 5.4.1

Divide each term in $19 z = - 115$ by $19$ .

$\frac{19 z}{19} = \frac{- 115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.4.2

Simplify the left side.

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Step 5.4.2.1

Cancel the common factor of $19$ .

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Step 5.4.2.1.1

Cancel the common factor.

$\frac{19 z}{19} = \frac{- 115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.4.2.1.2

Divide $z$ by $1$ .

$z = \frac{- 115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$z = \frac{- 115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$z = \frac{- 115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 5.4.3

Simplify the right side.

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Step 5.4.3.1

Move the negative in front of the fraction.

$z = - \frac{115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$z = - \frac{115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$z = - \frac{115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

$z = - \frac{115}{19}$

$x = - \frac{7 (5 + z)}{2}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6

Replace all occurrences of $z$ with $- \frac{115}{19}$ in each equation.

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Step 6.1

Replace all occurrences of $z$ in $x = - \frac{7 (5 + z)}{2}$ with $- \frac{115}{19}$ .

$x = - \frac{7 (5 - \frac{115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2

Simplify $x = - \frac{7 (5 - \frac{115}{19})}{2}$ .

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Step 6.2.1

Simplify the left side.

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Step 6.2.1.1

Remove parentheses.

$x = - \frac{7 (5 - \frac{115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{7 (5 - \frac{115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2

Simplify the right side.

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Step 6.2.2.1

Simplify $- \frac{7 (5 - \frac{115}{19})}{2}$ .

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Step 6.2.2.1.1

Simplify the numerator.

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Step 6.2.2.1.1.1

To write $5$ as a fraction with a common denominator, multiply by $\frac{19}{19}$ .

$x = - \frac{7 (5 \cdot \frac{19}{19} - \frac{115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.2

Combine $5$ and $\frac{19}{19}$ .

$x = - \frac{7 (\frac{5 \cdot 19}{19} - \frac{115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.3

Combine the numerators over the common denominator.

$x = - \frac{7 (\frac{5 \cdot 19 - 115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.4

Simplify the numerator.

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Step 6.2.2.1.1.4.1

Multiply $5$ by $19$ .

$x = - \frac{7 (\frac{95 - 115}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.4.2

Subtract $115$ from $95$ .

$x = - \frac{7 (\frac{- 20}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{7 (\frac{- 20}{19})}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.5

Move the negative in front of the fraction.

$x = - \frac{7 \cdot (- 1 (\frac{20}{19}))}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.6

Combine exponents.

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Step 6.2.2.1.1.6.1

Factor out negative.

$x = - \frac{- (7 (\frac{20}{19}))}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.6.2

Combine $7$ and $\frac{20}{19}$ .

$x = - \frac{- \frac{7 \cdot 20}{19}}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.1.6.3

Multiply $7$ by $20$ .

$x = - \frac{- \frac{140}{19}}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{- \frac{140}{19}}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{- \frac{140}{19}}{2}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.2

Multiply the numerator by the reciprocal of the denominator.

$x = - (- \frac{140}{19} \cdot \frac{1}{2})$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.3

Cancel the common factor of $2$ .

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Step 6.2.2.1.3.1

Move the leading negative in $- \frac{140}{19}$ into the numerator.

$x = - (\frac{- 140}{19} \cdot \frac{1}{2})$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.3.2

Factor $2$ out of $- 140$ .

$x = - (\frac{2 (- 70)}{19} \cdot \frac{1}{2})$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.3.3

Cancel the common factor.

$x = - (\frac{2 \cdot - 70}{19} \cdot \frac{1}{2})$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.3.4

Rewrite the expression.

$x = - \frac{- 70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = - \frac{- 70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.4

Move the negative in front of the fraction.

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.5

Multiply $- - \frac{70}{19}$ .

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Step 6.2.2.1.5.1

Multiply $- 1$ by $- 1$ .

$x = 1 (\frac{70}{19})$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.2.2.1.5.2

Multiply $\frac{70}{19}$ by $1$ .

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{9}{2} + \frac{z}{2}$

Step 6.3

Replace all occurrences of $z$ in $y = \frac{9}{2} + \frac{z}{2}$ with $- \frac{115}{19}$ .

$y = \frac{9}{2} + \frac{- \frac{115}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $\frac{9}{2} + \frac{- \frac{115}{19}}{2}$ .

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Step 6.4.1.1

Combine the numerators over the common denominator.

$y = \frac{9 - \frac{115}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.2

To write $9$ as a fraction with a common denominator, multiply by $\frac{19}{19}$ .

$y = \frac{9 \cdot \frac{19}{19} - \frac{115}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.3

Combine $9$ and $\frac{19}{19}$ .

$y = \frac{\frac{9 \cdot 19}{19} - \frac{115}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.4

Combine the numerators over the common denominator.

$y = \frac{\frac{9 \cdot 19 - 115}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.5

Simplify the numerator.

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Step 6.4.1.5.1

Multiply $9$ by $19$ .

$y = \frac{\frac{171 - 115}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.5.2

Subtract $115$ from $171$ .

$y = \frac{\frac{56}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{\frac{56}{19}}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.6

Multiply the numerator by the reciprocal of the denominator.

$y = \frac{56}{19} \cdot \frac{1}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.7

Cancel the common factor of $2$ .

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Step 6.4.1.7.1

Factor $2$ out of $56$ .

$y = \frac{2 (28)}{19} \cdot \frac{1}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.7.2

Cancel the common factor.

$y = \frac{2 \cdot 28}{19} \cdot \frac{1}{2}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 6.4.1.7.3

Rewrite the expression.

$y = \frac{28}{19}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{28}{19}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{28}{19}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{28}{19}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

$y = \frac{28}{19}$

$x = \frac{70}{19}$

$z = - \frac{115}{19}$

Step 7

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

$(\frac{70}{19}, \frac{28}{19}, - \frac{115}{19})$

Step 8

The result can be shown in multiple forms.

Point Form:

$(\frac{70}{19}, \frac{28}{19}, - \frac{115}{19})$

Equation Form:

$x = \frac{70}{19}, y = \frac{28}{19}, z = - \frac{115}{19}$