Algebra Examples

$2 x + 3 y - z = 0$ $x - 2 y - 4 z = 14$ $3 x + y - 8 z = 17$

Step 1

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

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Step 1.1

Add $2 y$ to both sides of the equation.

$x - 4 z = 14 + 2 y$

$2 x + 3 y - z = 0$

$3 x + y - 8 z = 17$

Step 1.2

Add $4 z$ to both sides of the equation.

$x = 14 + 2 y + 4 z$

$2 x + 3 y - z = 0$

$3 x + y - 8 z = 17$

$x = 14 + 2 y + 4 z$

$2 x + 3 y - z = 0$

$3 x + y - 8 z = 17$

Step 2

Replace all occurrences of $x$ with $14 + 2 y + 4 z$ in each equation.

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Step 2.1

Replace all occurrences of $x$ in $2 x + 3 y - z = 0$ with $14 + 2 y + 4 z$ .

$2 (14 + 2 y + 4 z) + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $2 (14 + 2 y + 4 z) + 3 y - z$ .

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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.

$2 \cdot 14 + 2 (2 y) + 2 (4 z) + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $2$ by $14$ .

$28 + 2 (2 y) + 2 (4 z) + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.2.1.1.2.2

Multiply $2$ by $2$ .

$28 + 4 y + 2 (4 z) + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.2.1.1.2.3

Multiply $4$ by $2$ .

$28 + 4 y + 8 z + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

$28 + 4 y + 8 z + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

$28 + 4 y + 8 z + 3 y - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Add $4 y$ and $3 y$ .

$28 + 7 y + 8 z - z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.2.1.2.2

Subtract $z$ from $8 z$ .

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$3 x + y - 8 z = 17$

Step 2.3

Replace all occurrences of $x$ in $3 x + y - 8 z = 17$ with $14 + 2 y + 4 z$ .

$3 (14 + 2 y + 4 z) + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $3 (14 + 2 y + 4 z) + y - 8 z$ .

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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.

$3 \cdot 14 + 3 (2 y) + 3 (4 z) + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 2.4.1.1.2

Simplify.

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Step 2.4.1.1.2.1

Multiply $3$ by $14$ .

$42 + 3 (2 y) + 3 (4 z) + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 2.4.1.1.2.2

Multiply $2$ by $3$ .

$42 + 6 y + 3 (4 z) + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 2.4.1.1.2.3

Multiply $4$ by $3$ .

$42 + 6 y + 12 z + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$42 + 6 y + 12 z + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$42 + 6 y + 12 z + y - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 2.4.1.2

Simplify by adding terms.

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Step 2.4.1.2.1

Add $6 y$ and $y$ .

$42 + 7 y + 12 z - 8 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 2.4.1.2.2

Subtract $8 z$ from $12 z$ .

$42 + 7 y + 4 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$42 + 7 y + 4 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$42 + 7 y + 4 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$42 + 7 y + 4 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$42 + 7 y + 4 z = 17$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3

Solve for $y$ in $42 + 7 y + 4 z = 17$ .

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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 $42$ from both sides of the equation.

$7 y + 4 z = 17 - 42$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3.1.2

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

$7 y = 17 - 42 - 4 z$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3.1.3

Subtract $42$ from $17$ .

$7 y = - 25 - 4 z$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$7 y = - 25 - 4 z$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3.2

Divide each term in $7 y = - 25 - 4 z$ by $7$ and simplify.

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Step 3.2.1

Divide each term in $7 y = - 25 - 4 z$ by $7$ .

$\frac{7 y}{7} = \frac{- 25}{7} + \frac{- 4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3.2.2

Simplify the left side.

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Step 3.2.2.1

Cancel the common factor of $7$ .

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Step 3.2.2.1.1

Cancel the common factor.

$\frac{7 y}{7} = \frac{- 25}{7} + \frac{- 4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3.2.2.1.2

Divide $y$ by $1$ .

$y = \frac{- 25}{7} + \frac{- 4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$y = \frac{- 25}{7} + \frac{- 4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$y = \frac{- 25}{7} + \frac{- 4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

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

Move the negative in front of the fraction.

$y = - \frac{25}{7} + \frac{- 4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 3.2.3.1.2

Move the negative in front of the fraction.

$y = - \frac{25}{7} - \frac{4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$28 + 7 y + 7 z = 0$

$x = 14 + 2 y + 4 z$

Step 4

Replace all occurrences of $y$ with $- \frac{25}{7} - \frac{4 z}{7}$ in each equation.

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Step 4.1

Replace all occurrences of $y$ in $28 + 7 y + 7 z = 0$ with $- \frac{25}{7} - \frac{4 z}{7}$ .

$28 + 7 (- \frac{25}{7} - \frac{4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $28 + 7 (- \frac{25}{7} - \frac{4 z}{7}) + 7 z$ .

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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.

$28 + 7 (- \frac{25}{7}) + 7 (- \frac{4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.1.2

Cancel the common factor of $7$ .

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Step 4.2.1.1.2.1

Move the leading negative in $- \frac{25}{7}$ into the numerator.

$28 + 7 (\frac{- 25}{7}) + 7 (- \frac{4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.1.2.2

Cancel the common factor.

$28 + 7 (\frac{- 25}{7}) + 7 (- \frac{4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.1.2.3

Rewrite the expression.

$28 - 25 + 7 (- \frac{4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

$28 - 25 + 7 (- \frac{4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.1.3

Cancel the common factor of $7$ .

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Step 4.2.1.1.3.1

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

$28 - 25 + 7 (\frac{- 4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.1.3.2

Cancel the common factor.

$28 - 25 + 7 (\frac{- 4 z}{7}) + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.1.3.3

Rewrite the expression.

$28 - 25 - 4 z + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

$28 - 25 - 4 z + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

$28 - 25 - 4 z + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.2

Simplify by adding terms.

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Step 4.2.1.2.1

Subtract $25$ from $28$ .

$3 - 4 z + 7 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.2.1.2.2

Add $- 4 z$ and $7 z$ .

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + 2 y + 4 z$

Step 4.3

Replace all occurrences of $y$ in $x = 14 + 2 y + 4 z$ with $- \frac{25}{7} - \frac{4 z}{7}$ .

$x = 14 + 2 (- \frac{25}{7} - \frac{4 z}{7}) + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4

Simplify the right side.

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Step 4.4.1

Simplify $14 + 2 (- \frac{25}{7} - \frac{4 z}{7}) + 4 z$ .

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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.

$x = 14 + 2 (- \frac{25}{7}) + 2 (- \frac{4 z}{7}) + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.2

Multiply $2 (- \frac{25}{7})$ .

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Step 4.4.1.1.2.1

Multiply $- 1$ by $2$ .

$x = 14 - 2 (\frac{25}{7}) + 2 (- \frac{4 z}{7}) + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.2.2

Combine $- 2$ and $\frac{25}{7}$ .

$x = 14 + \frac{- 2 \cdot 25}{7} + 2 (- \frac{4 z}{7}) + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.2.3

Multiply $- 2$ by $25$ .

$x = 14 + \frac{- 50}{7} + 2 (- \frac{4 z}{7}) + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + \frac{- 50}{7} + 2 (- \frac{4 z}{7}) + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.3

Multiply $2 (- \frac{4 z}{7})$ .

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Step 4.4.1.1.3.1

Multiply $- 1$ by $2$ .

$x = 14 + \frac{- 50}{7} - 2 \frac{4 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.3.2

Combine $- 2$ and $\frac{4 z}{7}$ .

$x = 14 + \frac{- 50}{7} + \frac{- 2 (4 z)}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.3.3

Multiply $4$ by $- 2$ .

$x = 14 + \frac{- 50}{7} + \frac{- 8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 + \frac{- 50}{7} + \frac{- 8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.4

Simplify each term.

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Step 4.4.1.1.4.1

Move the negative in front of the fraction.

$x = 14 - \frac{50}{7} + \frac{- 8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.1.4.2

Move the negative in front of the fraction.

$x = 14 - \frac{50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 - \frac{50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 14 - \frac{50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.2

To write $14$ as a fraction with a common denominator, multiply by $\frac{7}{7}$ .

$x = 14 \cdot \frac{7}{7} - \frac{50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.3

Combine $14$ and $\frac{7}{7}$ .

$x = \frac{14 \cdot 7}{7} - \frac{50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.4

Combine the numerators over the common denominator.

$x = \frac{14 \cdot 7 - 50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.5

Simplify the numerator.

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Step 4.4.1.5.1

Multiply $14$ by $7$ .

$x = \frac{98 - 50}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.5.2

Subtract $50$ from $98$ .

$x = \frac{48}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = \frac{48}{7} - \frac{8 z}{7} + 4 z$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.6

To write $4 z$ as a fraction with a common denominator, multiply by $\frac{7}{7}$ .

$x = \frac{48}{7} - \frac{8 z}{7} + 4 z \cdot \frac{7}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.7

Combine $4 z$ and $\frac{7}{7}$ .

$x = \frac{48}{7} - \frac{8 z}{7} + \frac{4 z \cdot 7}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.8

Combine the numerators over the common denominator.

$x = \frac{48}{7} + \frac{- 8 z + 4 z \cdot 7}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.9

Combine the numerators over the common denominator.

$x = \frac{48 - 8 z + 4 z \cdot 7}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.10

Multiply $7$ by $4$ .

$x = \frac{48 - 8 z + 28 z}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.11

Add $- 8 z$ and $28 z$ .

$x = \frac{48 + 20 z}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.12

Factor $4$ out of $48 + 20 z$ .

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Step 4.4.1.12.1

Factor $4$ out of $48$ .

$x = \frac{4 (12) + 20 z}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.12.2

Factor $4$ out of $20 z$ .

$x = \frac{4 (12) + 4 (5 z)}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 4.4.1.12.3

Factor $4$ out of $4 (12) + 4 (5 z)$ .

$x = \frac{4 (12 + 5 z)}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = \frac{4 (12 + 5 z)}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = \frac{4 (12 + 5 z)}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = \frac{4 (12 + 5 z)}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = \frac{4 (12 + 5 z)}{7}$

$3 + 3 z = 0$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 5

Solve for $z$ in $3 + 3 z = 0$ .

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Step 5.1

Subtract $3$ from both sides of the equation.

$3 z = - 3$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 5.2

Divide each term in $3 z = - 3$ by $3$ and simplify.

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Step 5.2.1

Divide each term in $3 z = - 3$ by $3$ .

$\frac{3 z}{3} = \frac{- 3}{3}$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 5.2.2

Simplify the left side.

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Step 5.2.2.1

Cancel the common factor of $3$ .

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Step 5.2.2.1.1

Cancel the common factor.

$\frac{3 z}{3} = \frac{- 3}{3}$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 5.2.2.1.2

Divide $z$ by $1$ .

$z = \frac{- 3}{3}$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$z = \frac{- 3}{3}$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$z = \frac{- 3}{3}$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 5.2.3

Simplify the right side.

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Step 5.2.3.1

Divide $- 3$ by $3$ .

$z = - 1$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$z = - 1$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$z = - 1$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$z = - 1$

$x = \frac{4 (12 + 5 z)}{7}$

$y = - \frac{25}{7} - \frac{4 z}{7}$

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 $x = \frac{4 (12 + 5 z)}{7}$ with $- 1$ .

$x = \frac{4 (12 + 5 (- 1))}{7}$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $\frac{4 (12 + 5 (- 1))}{7}$ .

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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 $- 1$ .

$x = \frac{4 (12 - 5)}{7}$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 6.2.1.1.2

Subtract $5$ from $12$ .

$x = \frac{4 \cdot 7}{7}$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = \frac{4 \cdot 7}{7}$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 6.2.1.2

Simplify the expression.

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Step 6.2.1.2.1

Multiply $4$ by $7$ .

$x = \frac{28}{7}$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 6.2.1.2.2

Divide $28$ by $7$ .

$x = 4$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 4$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 4$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

$x = 4$

$z = - 1$

$y = - \frac{25}{7} - \frac{4 z}{7}$

Step 6.3

Replace all occurrences of $z$ in $y = - \frac{25}{7} - \frac{4 z}{7}$ with $- 1$ .

$y = - \frac{25}{7} - \frac{4 (- 1)}{7}$

$x = 4$

$z = - 1$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $- \frac{25}{7} - \frac{4 (- 1)}{7}$ .

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Step 6.4.1.1

Combine the numerators over the common denominator.

$y = \frac{- 25 - 4 \cdot - 1}{7}$

$x = 4$

$z = - 1$

Step 6.4.1.2

Simplify the expression.

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Step 6.4.1.2.1

Multiply $- 4$ by $- 1$ .

$y = \frac{- 25 + 4}{7}$

$x = 4$

$z = - 1$

Step 6.4.1.2.2

Add $- 25$ and $4$ .

$y = \frac{- 21}{7}$

$x = 4$

$z = - 1$

Step 6.4.1.2.3

Divide $- 21$ by $7$ .

$y = - 3$

$x = 4$

$z = - 1$

$y = - 3$

$x = 4$

$z = - 1$

$y = - 3$

$x = 4$

$z = - 1$

$y = - 3$

$x = 4$

$z = - 1$

$y = - 3$

$x = 4$

$z = - 1$

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:

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