Finite Math Examples

$- 3 x + y + 2 z = - 13$ , $- x - y + z = 0$ , $2 x + 2 y - 3 z = - 1$

Step 1

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

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Step 1.1

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

$y + 2 z = - 13 + 3 x$

$- x - y + z = 0$

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

Step 1.2

Subtract $2 z$ from both sides of the equation.

$y = - 13 + 3 x - 2 z$

$- x - y + z = 0$

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

$y = - 13 + 3 x - 2 z$

$- x - y + z = 0$

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

Step 2

Replace all occurrences of $y$ with $- 13 + 3 x - 2 z$ in each equation.

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Step 2.1

Replace all occurrences of $y$ in $- x - y + z = 0$ with $- 13 + 3 x - 2 z$ .

$- x - (- 13 + 3 x - 2 z) + z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $- x - (- 13 + 3 x - 2 z) + z$ .

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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.

$- x + 13 - (3 x) - (- 2 z) + z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $- 1$ by $- 13$ .

$- x + 13 - (3 x) - (- 2 z) + z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.2.1.1.2.2

Multiply $3$ by $- 1$ .

$- x + 13 - 3 x - (- 2 z) + z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.2.1.1.2.3

Multiply $- 2$ by $- 1$ .

$- x + 13 - 3 x + 2 z + z = 0$

$y = - 13 + 3 x - 2 z$

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

$- x + 13 - 3 x + 2 z + z = 0$

$y = - 13 + 3 x - 2 z$

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

$- x + 13 - 3 x + 2 z + z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Subtract $3 x$ from $- x$ .

$- 4 x + 13 + 2 z + z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.2.1.2.2

Add $2 z$ and $z$ .

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

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

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

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

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

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

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

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

Step 2.3

Replace all occurrences of $y$ in $2 x + 2 y - 3 z = - 1$ with $- 13 + 3 x - 2 z$ .

$2 x + 2 (- 13 + 3 x - 2 z) - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $2 x + 2 (- 13 + 3 x - 2 z) - 3 z$ .

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Step 2.4.1.1

Simplify each term.

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Step 2.4.1.1.1

Apply the distributive property.

$2 x + 2 \cdot - 13 + 2 (3 x) + 2 (- 2 z) - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 2.4.1.1.2

Simplify.

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Step 2.4.1.1.2.1

Multiply $2$ by $- 13$ .

$2 x - 26 + 2 (3 x) + 2 (- 2 z) - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 2.4.1.1.2.2

Multiply $3$ by $2$ .

$2 x - 26 + 6 x + 2 (- 2 z) - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 2.4.1.1.2.3

Multiply $- 2$ by $2$ .

$2 x - 26 + 6 x - 4 z - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$2 x - 26 + 6 x - 4 z - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$2 x - 26 + 6 x - 4 z - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 2.4.1.2

Simplify by adding terms.

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Step 2.4.1.2.1

Add $2 x$ and $6 x$ .

$8 x - 26 - 4 z - 3 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 2.4.1.2.2

Subtract $3 z$ from $- 4 z$ .

$8 x - 26 - 7 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$8 x - 26 - 7 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$8 x - 26 - 7 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$8 x - 26 - 7 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$8 x - 26 - 7 z = - 1$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 3

Solve for $x$ in $8 x - 26 - 7 z = - 1$ .

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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 $26$ to both sides of the equation.

$8 x - 7 z = - 1 + 26$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 3.1.2

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

$8 x = - 1 + 26 + 7 z$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 3.1.3

Add $- 1$ and $26$ .

$8 x = 25 + 7 z$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$8 x = 25 + 7 z$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 3.2

Divide each term in $8 x = 25 + 7 z$ by $8$ and simplify.

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Step 3.2.1

Divide each term in $8 x = 25 + 7 z$ by $8$ .

$\frac{8 x}{8} = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

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.

$\frac{8 x}{8} = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 3.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$x = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$x = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$x = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

$x = \frac{25}{8} + \frac{7 z}{8}$

$- 4 x + 13 + 3 z = 0$

$y = - 13 + 3 x - 2 z$

Step 4

Replace all occurrences of $x$ with $\frac{25}{8} + \frac{7 z}{8}$ in each equation.

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Step 4.1

Replace all occurrences of $x$ in $- 4 x + 13 + 3 z = 0$ with $\frac{25}{8} + \frac{7 z}{8}$ .

$- 4 (\frac{25}{8} + \frac{7 z}{8}) + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $- 4 (\frac{25}{8} + \frac{7 z}{8}) + 13 + 3 z$ .

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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.

$- 4 (\frac{25}{8}) - 4 \frac{7 z}{8} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.2

Cancel the common factor of $4$ .

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Step 4.2.1.1.2.1

Factor $4$ out of $- 4$ .

$4 (- 1) (\frac{25}{8}) - 4 \frac{7 z}{8} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.2.2

Factor $4$ out of $8$ .

$4 \cdot (- 1 \frac{25}{4 \cdot 2}) - 4 \frac{7 z}{8} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.2.3

Cancel the common factor.

$4 \cdot (- 1 \frac{25}{4 \cdot 2}) - 4 \frac{7 z}{8} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.2.4

Rewrite the expression.

$- 1 (\frac{25}{2}) - 4 \frac{7 z}{8} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- 1 (\frac{25}{2}) - 4 \frac{7 z}{8} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.3

Cancel the common factor of $4$ .

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Step 4.2.1.1.3.1

Factor $4$ out of $- 4$ .

$- 1 (\frac{25}{2}) + 4 (- 1) (\frac{7 z}{8}) + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.3.2

Factor $4$ out of $8$ .

$- 1 (\frac{25}{2}) + 4 \cdot (- 1 \frac{7 z}{4 \cdot 2}) + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.3.3

Cancel the common factor.

$- 1 (\frac{25}{2}) + 4 \cdot (- 1 \frac{7 z}{4 \cdot 2}) + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.3.4

Rewrite the expression.

$- 1 (\frac{25}{2}) - 1 \frac{7 z}{2} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- 1 (\frac{25}{2}) - 1 \frac{7 z}{2} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.4

Simplify each term.

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Step 4.2.1.1.4.1

Rewrite $- 1 (\frac{25}{2})$ as $- (\frac{25}{2})$ .

$- (\frac{25}{2}) - 1 \frac{7 z}{2} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.1.4.2

Rewrite $- 1 \frac{7 z}{2}$ as $- \frac{7 z}{2}$ .

$- \frac{25}{2} - \frac{7 z}{2} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- \frac{25}{2} - \frac{7 z}{2} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- \frac{25}{2} - \frac{7 z}{2} + 13 + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.2

To write $13$ as a fraction with a common denominator, multiply by $\frac{2}{2}$ .

$- \frac{7 z}{2} - \frac{25}{2} + 13 \cdot \frac{2}{2} + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.3

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

$- \frac{7 z}{2} - \frac{25}{2} + \frac{13 \cdot 2}{2} + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.4

Combine the numerators over the common denominator.

$- \frac{7 z}{2} + \frac{- 25 + 13 \cdot 2}{2} + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.5

Simplify the numerator.

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Step 4.2.1.5.1

Multiply $13$ by $2$ .

$- \frac{7 z}{2} + \frac{- 25 + 26}{2} + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.5.2

Add $- 25$ and $26$ .

$- \frac{7 z}{2} + \frac{1}{2} + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- \frac{7 z}{2} + \frac{1}{2} + 3 z = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.6

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

$- \frac{7 z}{2} + 3 z \cdot \frac{2}{2} + \frac{1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.7

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

$- \frac{7 z}{2} + \frac{3 z \cdot 2}{2} + \frac{1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.8

Combine the numerators over the common denominator.

$\frac{- 7 z + 3 z \cdot 2}{2} + \frac{1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.9

Combine the numerators over the common denominator.

$\frac{- 7 z + 3 z \cdot 2 + 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.10

Multiply $2$ by $3$ .

$\frac{- 7 z + 6 z + 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.11

Add $- 7 z$ and $6 z$ .

$\frac{- z + 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.12

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

$\frac{- (z) + 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.13

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

$\frac{- (z) - 1 \cdot - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.14

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

$\frac{- (z - 1)}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.15

Simplify the expression.

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Step 4.2.1.15.1

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

$\frac{- 1 (z - 1)}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.2.1.15.2

Move the negative in front of the fraction.

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + 3 x - 2 z$

Step 4.3

Replace all occurrences of $x$ in $y = - 13 + 3 x - 2 z$ with $\frac{25}{8} + \frac{7 z}{8}$ .

$y = - 13 + 3 (\frac{25}{8} + \frac{7 z}{8}) - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4

Simplify the right side.

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Step 4.4.1

Simplify $- 13 + 3 (\frac{25}{8} + \frac{7 z}{8}) - 2 z$ .

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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.

$y = - 13 + 3 (\frac{25}{8}) + 3 (\frac{7 z}{8}) - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.1.2

Multiply $3 (\frac{25}{8})$ .

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Step 4.4.1.1.2.1

Combine $3$ and $\frac{25}{8}$ .

$y = - 13 + \frac{3 \cdot 25}{8} + 3 (\frac{7 z}{8}) - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.1.2.2

Multiply $3$ by $25$ .

$y = - 13 + \frac{75}{8} + 3 (\frac{7 z}{8}) - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + \frac{75}{8} + 3 (\frac{7 z}{8}) - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.1.3

Multiply $3 \frac{7 z}{8}$ .

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Step 4.4.1.1.3.1

Combine $3$ and $\frac{7 z}{8}$ .

$y = - 13 + \frac{75}{8} + \frac{3 (7 z)}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.1.3.2

Multiply $7$ by $3$ .

$y = - 13 + \frac{75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + \frac{75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 13 + \frac{75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.2

To write $- 13$ as a fraction with a common denominator, multiply by $\frac{8}{8}$ .

$y = - 13 \cdot \frac{8}{8} + \frac{75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.3

Combine $- 13$ and $\frac{8}{8}$ .

$y = \frac{- 13 \cdot 8}{8} + \frac{75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.4

Combine the numerators over the common denominator.

$y = \frac{- 13 \cdot 8 + 75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.5

Simplify the numerator.

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Step 4.4.1.5.1

Multiply $- 13$ by $8$ .

$y = \frac{- 104 + 75}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.5.2

Add $- 104$ and $75$ .

$y = \frac{- 29}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = \frac{- 29}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.6

Move the negative in front of the fraction.

$y = - \frac{29}{8} + \frac{21 z}{8} - 2 z$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.7

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

$y = - \frac{29}{8} + \frac{21 z}{8} - 2 z \cdot \frac{8}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.8

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

$y = - \frac{29}{8} + \frac{21 z}{8} + \frac{- 2 z \cdot 8}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.9

Combine the numerators over the common denominator.

$y = - \frac{29}{8} + \frac{21 z - 2 z \cdot 8}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.10

Combine the numerators over the common denominator.

$y = \frac{- 29 + 21 z - 2 z \cdot 8}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.11

Multiply $8$ by $- 2$ .

$y = \frac{- 29 + 21 z - 16 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.12

Subtract $16 z$ from $21 z$ .

$y = \frac{- 29 + 5 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.13

Rewrite $- 29$ as $- 1 (29)$ .

$y = \frac{- 1 \cdot 29 + 5 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.14

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

$y = \frac{- 1 \cdot 29 - (- 5 z)}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.15

Factor $- 1$ out of $- 1 (29) - (- 5 z)$ .

$y = \frac{- 1 (29 - 5 z)}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 4.4.1.16

Move the negative in front of the fraction.

$y = - \frac{29 - 5 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - \frac{29 - 5 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - \frac{29 - 5 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - \frac{29 - 5 z}{8}$

$- \frac{z - 1}{2} = 0$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 5

Solve for $z$ in $- \frac{z - 1}{2} = 0$ .

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Step 5.1

Set the numerator equal to zero.

$z - 1 = 0$

$y = - \frac{29 - 5 z}{8}$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 5.2

Add $1$ to both sides of the equation.

$z = 1$

$y = - \frac{29 - 5 z}{8}$

$x = \frac{25}{8} + \frac{7 z}{8}$

$z = 1$

$y = - \frac{29 - 5 z}{8}$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 6

Replace all occurrences of $z$ with $1$ in each equation.

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Step 6.1

Replace all occurrences of $z$ in $y = - \frac{29 - 5 z}{8}$ with $1$ .

$y = - \frac{29 - 5 \cdot 1}{8}$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $- \frac{29 - 5 \cdot 1}{8}$ .

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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 $1$ .

$y = - \frac{29 - 5}{8}$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 6.2.1.1.2

Subtract $5$ from $29$ .

$y = - \frac{24}{8}$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - \frac{24}{8}$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 6.2.1.2

Simplify the expression.

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Step 6.2.1.2.1

Divide $24$ by $8$ .

$y = - 1 \cdot 3$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 6.2.1.2.2

Multiply $- 1$ by $3$ .

$y = - 3$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 3$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 3$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

$y = - 3$

$z = 1$

$x = \frac{25}{8} + \frac{7 z}{8}$

Step 6.3

Replace all occurrences of $z$ in $x = \frac{25}{8} + \frac{7 z}{8}$ with $1$ .

$x = \frac{25}{8} + \frac{7 (1)}{8}$

$y = - 3$

$z = 1$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $\frac{25}{8} + \frac{7 (1)}{8}$ .

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Step 6.4.1.1

Combine the numerators over the common denominator.

$x = \frac{25 + 7 (1)}{8}$

$y = - 3$

$z = 1$

Step 6.4.1.2

Simplify the expression.

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Step 6.4.1.2.1

Multiply $7$ by $1$ .

$x = \frac{25 + 7}{8}$

$y = - 3$

$z = 1$

Step 6.4.1.2.2

Add $25$ and $7$ .

$x = \frac{32}{8}$

$y = - 3$

$z = 1$

Step 6.4.1.2.3

Divide $32$ by $8$ .

$x = 4$

$y = - 3$

$z = 1$

$x = 4$

$y = - 3$

$z = 1$

$x = 4$

$y = - 3$

$z = 1$

$x = 4$

$y = - 3$

$z = 1$

$x = 4$

$y = - 3$

$z = 1$

Step 7

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

$(4, - 3, 1)$

Step 8

The result can be shown in multiple forms.

Point Form:

$(4, - 3, 1)$

Equation Form:

$x = 4, y = - 3, z = 1$