Finite Math Examples

$x - y + 3 z = 1$ , $2 y + 2 z = 3$ , $3 x + 4 y - 6 z = - 5$

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.

$x + 3 z = 1 + y$

$2 y + 2 z = 3$

$3 x + 4 y - 6 z = - 5$

Step 1.2

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

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 x + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 x + 4 y - 6 z = - 5$

Step 2

Replace all occurrences of $x$ with $1 + y - 3 z$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $3 x + 4 y - 6 z = - 5$ with $1 + y - 3 z$ .

$3 (1 + y - 3 z) + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $3 (1 + y - 3 z) + 4 y - 6 z$ .

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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.

$3 \cdot 1 + 3 y + 3 (- 3 z) + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $3$ by $1$ .

$3 + 3 y + 3 (- 3 z) + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 2.2.1.1.2.2

Multiply $- 3$ by $3$ .

$3 + 3 y - 9 z + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 + 3 y - 9 z + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 + 3 y - 9 z + 4 y - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Add $3 y$ and $4 y$ .

$3 + 7 y - 9 z - 6 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 2.2.1.2.2

Subtract $6 z$ from $- 9 z$ .

$3 + 7 y - 15 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 + 7 y - 15 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 + 7 y - 15 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 + 7 y - 15 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$3 + 7 y - 15 z = - 5$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3

Solve for $y$ in $3 + 7 y - 15 z = - 5$ .

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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

Subtract $3$ from both sides of the equation.

$7 y - 15 z = - 5 - 3$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3.1.2

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

$7 y = - 5 - 3 + 15 z$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3.1.3

Subtract $3$ from $- 5$ .

$7 y = - 8 + 15 z$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$7 y = - 8 + 15 z$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3.2

Divide each term in $7 y = - 8 + 15 z$ by $7$ and simplify.

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Step 3.2.1

Divide each term in $7 y = - 8 + 15 z$ by $7$ .

$\frac{7 y}{7} = \frac{- 8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3.2.2

Simplify the left side.

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Step 3.2.2.1

Cancel the common factor of $7$ .

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Step 3.2.2.1.1

Cancel the common factor.

$\frac{7 y}{7} = \frac{- 8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{- 8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$y = \frac{- 8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$y = \frac{- 8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 3.2.3

Simplify the right side.

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Step 3.2.3.1

Move the negative in front of the fraction.

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = 1 + y - 3 z$

$2 y + 2 z = 3$

Step 4

Replace all occurrences of $y$ with $- \frac{8}{7} + \frac{15 z}{7}$ in each equation.

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Step 4.1

Replace all occurrences of $y$ in $x = 1 + y - 3 z$ with $- \frac{8}{7} + \frac{15 z}{7}$ .

$x = 1 - \frac{8}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2

Simplify $x = 1 - \frac{8}{7} + \frac{15 z}{7} - 3 z$ .

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Step 4.2.1

Simplify the left side.

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Step 4.2.1.1

Remove parentheses.

$x = 1 - \frac{8}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

$x = 1 - \frac{8}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2

Simplify the right side.

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Step 4.2.2.1

Simplify $1 - \frac{8}{7} + \frac{15 z}{7} - 3 z$ .

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Step 4.2.2.1.1

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

$x = \frac{7}{7} - \frac{8}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.2

Combine the numerators over the common denominator.

$x = \frac{7 - 8}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.3

Subtract $8$ from $7$ .

$x = \frac{- 1}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.4

Move the negative in front of the fraction.

$x = - \frac{1}{7} + \frac{15 z}{7} - 3 z$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.5

To write $- 3 z$ as a fraction with a common denominator, multiply by $\frac{7}{7}$ .

$x = - \frac{1}{7} + \frac{15 z}{7} - 3 z \cdot \frac{7}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.6

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

$x = - \frac{1}{7} + \frac{15 z}{7} + \frac{- 3 z \cdot 7}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.7

Combine the numerators over the common denominator.

$x = - \frac{1}{7} + \frac{15 z - 3 z \cdot 7}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.8

Combine the numerators over the common denominator.

$x = \frac{- 1 + 15 z - 3 z \cdot 7}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.9

Multiply $7$ by $- 3$ .

$x = \frac{- 1 + 15 z - 21 z}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.10

Subtract $21 z$ from $15 z$ .

$x = \frac{- 1 - 6 z}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.11

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

$x = \frac{- 1 \cdot 1 - 6 z}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.12

Factor $- 1$ out of $- 6 z$ .

$x = \frac{- 1 \cdot 1 - (6 z)}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.13

Factor $- 1$ out of $- 1 (1) - (6 z)$ .

$x = \frac{- 1 (1 + 6 z)}{7}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.2.2.1.14

Move the negative in front of the fraction.

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$2 y + 2 z = 3$

Step 4.3

Replace all occurrences of $y$ in $2 y + 2 z = 3$ with $- \frac{8}{7} + \frac{15 z}{7}$ .

$2 (- \frac{8}{7} + \frac{15 z}{7}) + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4

Simplify the left side.

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Step 4.4.1

Simplify $2 (- \frac{8}{7} + \frac{15 z}{7}) + 2 z$ .

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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.

$2 (- \frac{8}{7}) + 2 (\frac{15 z}{7}) + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.1.2

Multiply $2 (- \frac{8}{7})$ .

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Step 4.4.1.1.2.1

Multiply $- 1$ by $2$ .

$- 2 (\frac{8}{7}) + 2 (\frac{15 z}{7}) + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.1.2.2

Combine $- 2$ and $\frac{8}{7}$ .

$\frac{- 2 \cdot 8}{7} + 2 (\frac{15 z}{7}) + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.1.2.3

Multiply $- 2$ by $8$ .

$\frac{- 16}{7} + 2 (\frac{15 z}{7}) + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$\frac{- 16}{7} + 2 (\frac{15 z}{7}) + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.1.3

Multiply $2 \frac{15 z}{7}$ .

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Step 4.4.1.1.3.1

Combine $2$ and $\frac{15 z}{7}$ .

$\frac{- 16}{7} + \frac{2 (15 z)}{7} + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.1.3.2

Multiply $15$ by $2$ .

$\frac{- 16}{7} + \frac{30 z}{7} + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$\frac{- 16}{7} + \frac{30 z}{7} + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.1.4

Move the negative in front of the fraction.

$- \frac{16}{7} + \frac{30 z}{7} + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$- \frac{16}{7} + \frac{30 z}{7} + 2 z = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.2

To write $2 z$ as a fraction with a common denominator, multiply by $\frac{7}{7}$ .

$- \frac{16}{7} + \frac{30 z}{7} + 2 z \cdot \frac{7}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.3

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

$- \frac{16}{7} + \frac{30 z}{7} + \frac{2 z \cdot 7}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.4

Combine the numerators over the common denominator.

$- \frac{16}{7} + \frac{30 z + 2 z \cdot 7}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.5

Combine the numerators over the common denominator.

$\frac{- 16 + 30 z + 2 z \cdot 7}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.6

Multiply $7$ by $2$ .

$\frac{- 16 + 30 z + 14 z}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.7

Add $30 z$ and $14 z$ .

$\frac{- 16 + 44 z}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.8

Factor $4$ out of $- 16 + 44 z$ .

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Step 4.4.1.8.1

Factor $4$ out of $- 16$ .

$\frac{4 (- 4) + 44 z}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.8.2

Factor $4$ out of $44 z$ .

$\frac{4 (- 4) + 4 (11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.8.3

Factor $4$ out of $4 (- 4) + 4 (11 z)$ .

$\frac{4 (- 4 + 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$\frac{4 (- 4 + 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.9

Rewrite $- 4$ as $- 1 (4)$ .

$\frac{4 (- 1 \cdot 4 + 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.10

Factor $- 1$ out of $11 z$ .

$\frac{4 (- 1 \cdot 4 - (- 11 z))}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.11

Factor $- 1$ out of $- 1 (4) - (- 11 z)$ .

$\frac{4 (- 1 (4 - 11 z))}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 4.4.1.12

Move the negative in front of the fraction.

$- \frac{4 (4 - 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$- \frac{4 (4 - 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$- \frac{4 (4 - 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$- \frac{4 (4 - 11 z)}{7} = 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5

Solve for $z$ in $- \frac{4 (4 - 11 z)}{7} = 3$ .

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Step 5.1

Multiply both sides of the equation by $- \frac{7}{4}$ .

$- \frac{7}{4} \cdot (- \frac{4 (4 - 11 z)}{7}) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

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 $- \frac{7}{4} (- \frac{4 (4 - 11 z)}{7})$ .

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Step 5.2.1.1.1

Cancel the common factor of $7$ .

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Step 5.2.1.1.1.1

Move the leading negative in $- \frac{7}{4}$ into the numerator.

$\frac{- 7}{4} \cdot (- \frac{4 (4 - 11 z)}{7}) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.1.2

Move the leading negative in $- \frac{4 (4 - 11 z)}{7}$ into the numerator.

$\frac{- 7}{4} \cdot \frac{- 4 (4 - 11 z)}{7} = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.1.3

Factor $7$ out of $- 7$ .

$\frac{7 (- 1)}{4} \cdot \frac{- 4 (4 - 11 z)}{7} = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.1.4

Cancel the common factor.

$\frac{7 \cdot - 1}{4} \cdot \frac{- 4 (4 - 11 z)}{7} = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.1.5

Rewrite the expression.

$\frac{- 1}{4} \cdot (- 4 (4 - 11 z)) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$\frac{- 1}{4} \cdot (- 4 (4 - 11 z)) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.2

Cancel the common factor of $4$ .

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Step 5.2.1.1.2.1

Factor $4$ out of $- 4 (4 - 11 z)$ .

$\frac{- 1}{4} \cdot (4 (- (4 - 11 z))) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.2.2

Cancel the common factor.

$\frac{- 1}{4} \cdot (4 (- (4 - 11 z))) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.2.3

Rewrite the expression.

$4 - 11 z = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$4 - 11 z = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.3

Multiply.

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Step 5.2.1.1.3.1

Multiply $- 1$ by $- 1$ .

$1 (4 - 11 z) = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.1.1.3.2

Multiply $4 - 11 z$ by $1$ .

$4 - 11 z = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$4 - 11 z = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$4 - 11 z = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$4 - 11 z = - \frac{7}{4} \cdot 3$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.2

Simplify the right side.

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Step 5.2.2.1

Simplify $- \frac{7}{4} \cdot 3$ .

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Step 5.2.2.1.1

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

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Step 5.2.2.1.1.1

Multiply $3$ by $- 1$ .

$4 - 11 z = - 3 (\frac{7}{4})$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.2.1.1.2

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

$4 - 11 z = \frac{- 3 \cdot 7}{4}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.2.1.1.3

Multiply $- 3$ by $7$ .

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.2.2.1.2

Move the negative in front of the fraction.

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

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 $4$ from both sides of the equation.

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.3.2

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

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.3.3

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

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.3.4

Combine the numerators over the common denominator.

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.3.5

Simplify the numerator.

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Step 5.3.5.1

Multiply $- 4$ by $4$ .

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

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.3.5.2

Subtract $16$ from $- 21$ .

$- 11 z = \frac{- 37}{4}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$- 11 z = \frac{- 37}{4}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.3.6

Move the negative in front of the fraction.

$- 11 z = - \frac{37}{4}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$- 11 z = - \frac{37}{4}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4

Divide each term in $- 11 z = - \frac{37}{4}$ by $- 11$ and simplify.

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Step 5.4.1

Divide each term in $- 11 z = - \frac{37}{4}$ by $- 11$ .

$\frac{- 11 z}{- 11} = \frac{- \frac{37}{4}}{- 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.2

Simplify the left side.

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Step 5.4.2.1

Cancel the common factor of $- 11$ .

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Step 5.4.2.1.1

Cancel the common factor.

$\frac{- 11 z}{- 11} = \frac{- \frac{37}{4}}{- 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.2.1.2

Divide $z$ by $1$ .

$z = \frac{- \frac{37}{4}}{- 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$z = \frac{- \frac{37}{4}}{- 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$z = \frac{- \frac{37}{4}}{- 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.3

Simplify the right side.

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Step 5.4.3.1

Multiply the numerator by the reciprocal of the denominator.

$z = - \frac{37}{4} \cdot \frac{1}{- 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.3.2

Move the negative in front of the fraction.

$z = - \frac{37}{4} \cdot (- \frac{1}{11})$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.3.3

Multiply $- \frac{37}{4} (- \frac{1}{11})$ .

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Step 5.4.3.3.1

Multiply $- 1$ by $- 1$ .

$z = 1 (\frac{37}{4}) \cdot \frac{1}{11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.3.3.2

Multiply $\frac{37}{4}$ by $1$ .

$z = \frac{37}{4} \cdot \frac{1}{11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.3.3.3

Multiply $\frac{37}{4}$ by $\frac{1}{11}$ .

$z = \frac{37}{4 \cdot 11}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 5.4.3.3.4

Multiply $4$ by $11$ .

$z = \frac{37}{44}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$z = \frac{37}{44}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$z = \frac{37}{44}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$z = \frac{37}{44}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

$z = \frac{37}{44}$

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

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6

Replace all occurrences of $z$ with $\frac{37}{44}$ in each equation.

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Step 6.1

Replace all occurrences of $z$ in $x = - \frac{1 + 6 z}{7}$ with $\frac{37}{44}$ .

$x = - \frac{1 + 6 (\frac{37}{44})}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $- \frac{1 + 6 (\frac{37}{44})}{7}$ .

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Step 6.2.1.1

Simplify the numerator.

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Step 6.2.1.1.1

Cancel the common factor of $2$ .

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Step 6.2.1.1.1.1

Factor $2$ out of $6$ .

$x = - \frac{1 + 2 (3) (\frac{37}{44})}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.1.2

Factor $2$ out of $44$ .

$x = - \frac{1 + 2 \cdot (3 (\frac{37}{2 \cdot 22}))}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.1.3

Cancel the common factor.

$x = - \frac{1 + 2 \cdot (3 (\frac{37}{2 \cdot 22}))}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.1.4

Rewrite the expression.

$x = - \frac{1 + 3 (\frac{37}{22})}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = - \frac{1 + 3 (\frac{37}{22})}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.2

Combine $3$ and $\frac{37}{22}$ .

$x = - \frac{1 + \frac{3 \cdot 37}{22}}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.3

Multiply $3$ by $37$ .

$x = - \frac{1 + \frac{111}{22}}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.4

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

$x = - \frac{\frac{22}{22} + \frac{111}{22}}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.5

Combine the numerators over the common denominator.

$x = - \frac{\frac{22 + 111}{22}}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.1.6

Add $22$ and $111$ .

$x = - \frac{\frac{133}{22}}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = - \frac{\frac{133}{22}}{7}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.2

Multiply the numerator by the reciprocal of the denominator.

$x = - (\frac{133}{22} \cdot \frac{1}{7})$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.3

Cancel the common factor of $7$ .

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Step 6.2.1.3.1

Factor $7$ out of $133$ .

$x = - (\frac{7 (19)}{22} \cdot \frac{1}{7})$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.3.2

Cancel the common factor.

$x = - (\frac{7 \cdot 19}{22} \cdot \frac{1}{7})$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.2.1.3.3

Rewrite the expression.

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = - \frac{8}{7} + \frac{15 z}{7}$

Step 6.3

Replace all occurrences of $z$ in $y = - \frac{8}{7} + \frac{15 z}{7}$ with $\frac{37}{44}$ .

$y = - \frac{8}{7} + \frac{15 (\frac{37}{44})}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $- \frac{8}{7} + \frac{15 (\frac{37}{44})}{7}$ .

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Step 6.4.1.1

Combine the numerators over the common denominator.

$y = \frac{- 8 + 15 (\frac{37}{44})}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.2

Multiply $15 (\frac{37}{44})$ .

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Step 6.4.1.2.1

Combine $15$ and $\frac{37}{44}$ .

$y = \frac{- 8 + \frac{15 \cdot 37}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.2.2

Multiply $15$ by $37$ .

$y = \frac{- 8 + \frac{555}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = \frac{- 8 + \frac{555}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.3

To write $- 8$ as a fraction with a common denominator, multiply by $\frac{44}{44}$ .

$y = \frac{- 8 \cdot \frac{44}{44} + \frac{555}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.4

Combine $- 8$ and $\frac{44}{44}$ .

$y = \frac{\frac{- 8 \cdot 44}{44} + \frac{555}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.5

Combine the numerators over the common denominator.

$y = \frac{\frac{- 8 \cdot 44 + 555}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.6

Simplify the numerator.

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Step 6.4.1.6.1

Multiply $- 8$ by $44$ .

$y = \frac{\frac{- 352 + 555}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.6.2

Add $- 352$ and $555$ .

$y = \frac{\frac{203}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = \frac{\frac{203}{44}}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.7

Multiply the numerator by the reciprocal of the denominator.

$y = \frac{203}{44} \cdot \frac{1}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.8

Cancel the common factor of $7$ .

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Step 6.4.1.8.1

Factor $7$ out of $203$ .

$y = \frac{7 (29)}{44} \cdot \frac{1}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.8.2

Cancel the common factor.

$y = \frac{7 \cdot 29}{44} \cdot \frac{1}{7}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 6.4.1.8.3

Rewrite the expression.

$y = \frac{29}{44}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = \frac{29}{44}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = \frac{29}{44}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = \frac{29}{44}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

$y = \frac{29}{44}$

$x = - \frac{19}{22}$

$z = \frac{37}{44}$

Step 7

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

$(- \frac{19}{22}, \frac{29}{44}, \frac{37}{44})$

Step 8

The result can be shown in multiple forms.

Point Form:

$(- \frac{19}{22}, \frac{29}{44}, \frac{37}{44})$

Equation Form:

$x = - \frac{19}{22}, y = \frac{29}{44}, z = \frac{37}{44}$