Precalculus Examples

$8 r - s + t = - 42$ , $3 r + 2 s - 3 t = - 32$ , $r - 3 s + 2 t = 10$

Step 1

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

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Step 1.1

Subtract $8 r$ from both sides of the equation.

$- s + t = - 42 - 8 r$

$3 r + 2 s - 3 t = - 32$

$r - 3 s + 2 t = 10$

Step 1.2

Add $s$ to both sides of the equation.

$t = - 42 - 8 r + s$

$3 r + 2 s - 3 t = - 32$

$r - 3 s + 2 t = 10$

$t = - 42 - 8 r + s$

$3 r + 2 s - 3 t = - 32$

$r - 3 s + 2 t = 10$

Step 2

Replace all occurrences of $t$ with $- 42 - 8 r + s$ in each equation.

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Step 2.1

Replace all occurrences of $t$ in $3 r + 2 s - 3 t = - 32$ with $- 42 - 8 r + s$ .

$3 r + 2 s - 3 (- 42 - 8 r + s) = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify $3 r + 2 s - 3 (- 42 - 8 r + s)$ .

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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.

$3 r + 2 s - 3 \cdot - 42 - 3 (- 8 r) - 3 s = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

Step 2.2.1.1.2

Simplify.

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Step 2.2.1.1.2.1

Multiply $- 3$ by $- 42$ .

$3 r + 2 s + 126 - 3 (- 8 r) - 3 s = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

Step 2.2.1.1.2.2

Multiply $- 8$ by $- 3$ .

$3 r + 2 s + 126 + 24 r - 3 s = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

$3 r + 2 s + 126 + 24 r - 3 s = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

$3 r + 2 s + 126 + 24 r - 3 s = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

Step 2.2.1.2

Simplify by adding terms.

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Step 2.2.1.2.1

Add $3 r$ and $24 r$ .

$27 r + 2 s + 126 - 3 s = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

Step 2.2.1.2.2

Subtract $3 s$ from $2 s$ .

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r - 3 s + 2 t = 10$

Step 2.3

Replace all occurrences of $t$ in $r - 3 s + 2 t = 10$ with $- 42 - 8 r + s$ .

$r - 3 s + 2 (- 42 - 8 r + s) = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 2.4

Simplify the left side.

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Step 2.4.1

Simplify $r - 3 s + 2 (- 42 - 8 r + s)$ .

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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.

$r - 3 s + 2 \cdot - 42 + 2 (- 8 r) + 2 s = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 2.4.1.1.2

Simplify.

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Step 2.4.1.1.2.1

Multiply $2$ by $- 42$ .

$r - 3 s - 84 + 2 (- 8 r) + 2 s = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 2.4.1.1.2.2

Multiply $- 8$ by $2$ .

$r - 3 s - 84 - 16 r + 2 s = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r - 3 s - 84 - 16 r + 2 s = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r - 3 s - 84 - 16 r + 2 s = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 2.4.1.2

Simplify by adding terms.

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Step 2.4.1.2.1

Subtract $16 r$ from $r$ .

$- 15 r - 3 s - 84 + 2 s = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 2.4.1.2.2

Add $- 3 s$ and $2 s$ .

$- 15 r - s - 84 = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$- 15 r - s - 84 = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$- 15 r - s - 84 = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$- 15 r - s - 84 = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$- 15 r - s - 84 = 10$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3

Solve for $r$ in $- 15 r - s - 84 = 10$ .

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Step 3.1

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

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Step 3.1.1

Add $s$ to both sides of the equation.

$- 15 r - 84 = 10 + s$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3.1.2

Add $84$ to both sides of the equation.

$- 15 r = 10 + s + 84$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3.1.3

Add $10$ and $84$ .

$- 15 r = s + 94$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$- 15 r = s + 94$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3.2

Divide each term in $- 15 r = s + 94$ by $- 15$ and simplify.

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Step 3.2.1

Divide each term in $- 15 r = s + 94$ by $- 15$ .

$\frac{- 15 r}{- 15} = \frac{s}{- 15} + \frac{94}{- 15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3.2.2

Simplify the left side.

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Step 3.2.2.1

Cancel the common factor of $- 15$ .

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Step 3.2.2.1.1

Cancel the common factor.

$\frac{- 15 r}{- 15} = \frac{s}{- 15} + \frac{94}{- 15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3.2.2.1.2

Divide $r$ by $1$ .

$r = \frac{s}{- 15} + \frac{94}{- 15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r = \frac{s}{- 15} + \frac{94}{- 15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r = \frac{s}{- 15} + \frac{94}{- 15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

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.

$r = - \frac{s}{15} + \frac{94}{- 15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 3.2.3.1.2

Move the negative in front of the fraction.

$r = - \frac{s}{15} - \frac{94}{15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r = - \frac{s}{15} - \frac{94}{15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r = - \frac{s}{15} - \frac{94}{15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r = - \frac{s}{15} - \frac{94}{15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

$r = - \frac{s}{15} - \frac{94}{15}$

$27 r - s + 126 = - 32$

$t = - 42 - 8 r + s$

Step 4

Replace all occurrences of $r$ with $- \frac{s}{15} - \frac{94}{15}$ in each equation.

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Step 4.1

Replace all occurrences of $r$ in $27 r - s + 126 = - 32$ with $- \frac{s}{15} - \frac{94}{15}$ .

$27 (- \frac{s}{15} - \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2

Simplify the left side.

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Step 4.2.1

Simplify $27 (- \frac{s}{15} - \frac{94}{15}) - s + 126$ .

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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.

$27 (- \frac{s}{15}) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.2

Cancel the common factor of $3$ .

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Step 4.2.1.1.2.1

Move the leading negative in $- \frac{s}{15}$ into the numerator.

$27 (\frac{- s}{15}) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.2.2

Factor $3$ out of $27$ .

$3 (9) (\frac{- s}{15}) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.2.3

Factor $3$ out of $15$ .

$3 \cdot (9 (\frac{- s}{3 \cdot 5})) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.2.4

Cancel the common factor.

$3 \cdot (9 (\frac{- s}{3 \cdot 5})) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.2.5

Rewrite the expression.

$9 (\frac{- s}{5}) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$9 (\frac{- s}{5}) + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.3

Combine $9$ and $\frac{- s}{5}$ .

$\frac{9 (- s)}{5} + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.4

Multiply $- 1$ by $9$ .

$\frac{- 9 s}{5} + 27 (- \frac{94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.5

Cancel the common factor of $3$ .

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Step 4.2.1.1.5.1

Move the leading negative in $- \frac{94}{15}$ into the numerator.

$\frac{- 9 s}{5} + 27 (\frac{- 94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.5.2

Factor $3$ out of $27$ .

$\frac{- 9 s}{5} + 3 (9) (\frac{- 94}{15}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.5.3

Factor $3$ out of $15$ .

$\frac{- 9 s}{5} + 3 \cdot (9 (\frac{- 94}{3 \cdot 5})) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.5.4

Cancel the common factor.

$\frac{- 9 s}{5} + 3 \cdot (9 (\frac{- 94}{3 \cdot 5})) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.5.5

Rewrite the expression.

$\frac{- 9 s}{5} + 9 (\frac{- 94}{5}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$\frac{- 9 s}{5} + 9 (\frac{- 94}{5}) - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.6

Combine $9$ and $\frac{- 94}{5}$ .

$\frac{- 9 s}{5} + \frac{9 \cdot - 94}{5} - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.7

Multiply $9$ by $- 94$ .

$\frac{- 9 s}{5} + \frac{- 846}{5} - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.8

Simplify each term.

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Step 4.2.1.1.8.1

Move the negative in front of the fraction.

$- \frac{9 s}{5} + \frac{- 846}{5} - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.1.8.2

Move the negative in front of the fraction.

$- \frac{9 s}{5} - \frac{846}{5} - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$- \frac{9 s}{5} - \frac{846}{5} - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$- \frac{9 s}{5} - \frac{846}{5} - s + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.2

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

$- \frac{9 s}{5} - s \cdot \frac{5}{5} - \frac{846}{5} + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.3

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

$- \frac{9 s}{5} + \frac{- s \cdot 5}{5} - \frac{846}{5} + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.4

Combine the numerators over the common denominator.

$\frac{- 9 s - s \cdot 5}{5} - \frac{846}{5} + 126 = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.5

Combine the numerators over the common denominator.

$126 + \frac{- 9 s - s \cdot 5 - 846}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.6

Multiply $5$ by $- 1$ .

$126 + \frac{- 9 s - 5 s - 846}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.7

Subtract $5 s$ from $- 9 s$ .

$126 + \frac{- 14 s - 846}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.8

Factor $2$ out of $- 14 s - 846$ .

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Step 4.2.1.8.1

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

$126 + \frac{2 (- 7 s) - 846}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.8.2

Factor $2$ out of $- 846$ .

$126 + \frac{2 (- 7 s) + 2 (- 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.8.3

Factor $2$ out of $2 (- 7 s) + 2 (- 423)$ .

$126 + \frac{2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$126 + \frac{2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.9

To write $126$ as a fraction with a common denominator, multiply by $\frac{5}{5}$ .

$126 \cdot \frac{5}{5} + \frac{2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.10

Simplify terms.

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Step 4.2.1.10.1

Combine $126$ and $\frac{5}{5}$ .

$\frac{126 \cdot 5}{5} + \frac{2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.10.2

Combine the numerators over the common denominator.

$\frac{126 \cdot 5 + 2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$\frac{126 \cdot 5 + 2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.11

Simplify the numerator.

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Step 4.2.1.11.1

Factor $2$ out of $126 \cdot 5 + 2 (- 7 s - 423)$ .

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Step 4.2.1.11.1.1

Factor $2$ out of $126 \cdot 5$ .

$\frac{2 (63 \cdot 5) + 2 (- 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.11.1.2

Factor $2$ out of $2 (63 \cdot 5) + 2 (- 7 s - 423)$ .

$\frac{2 (63 \cdot 5 - 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$\frac{2 (63 \cdot 5 - 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.11.2

Multiply $63$ by $5$ .

$\frac{2 (315 - 7 s - 423)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.11.3

Subtract $423$ from $315$ .

$\frac{2 (- 7 s - 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$\frac{2 (- 7 s - 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.12

Simplify with factoring out.

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Step 4.2.1.12.1

Factor $- 1$ out of $- 7 s$ .

$\frac{2 (- (7 s) - 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.12.2

Rewrite $- 108$ as $- 1 (108)$ .

$\frac{2 (- (7 s) - 1 \cdot 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.12.3

Factor $- 1$ out of $- (7 s) - 1 (108)$ .

$\frac{2 (- (7 s + 108))}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.12.4

Simplify the expression.

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Step 4.2.1.12.4.1

Rewrite $- (7 s + 108)$ as $- 1 (7 s + 108)$ .

$\frac{2 (- 1 (7 s + 108))}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.2.1.12.4.2

Move the negative in front of the fraction.

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 - 8 r + s$

Step 4.3

Replace all occurrences of $r$ in $t = - 42 - 8 r + s$ with $- \frac{s}{15} - \frac{94}{15}$ .

$t = - 42 - 8 (- \frac{s}{15} - \frac{94}{15}) + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4

Simplify the right side.

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Step 4.4.1

Simplify $- 42 - 8 (- \frac{s}{15} - \frac{94}{15}) + s$ .

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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.

$t = - 42 - 8 (- \frac{s}{15}) - 8 (- \frac{94}{15}) + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.1.2

Multiply $- 8 (- \frac{s}{15})$ .

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Step 4.4.1.1.2.1

Multiply $- 1$ by $- 8$ .

$t = - 42 + 8 (\frac{s}{15}) - 8 (- \frac{94}{15}) + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.1.2.2

Combine $8$ and $\frac{s}{15}$ .

$t = - 42 + \frac{8 s}{15} - 8 (- \frac{94}{15}) + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 + \frac{8 s}{15} - 8 (- \frac{94}{15}) + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.1.3

Multiply $- 8 (- \frac{94}{15})$ .

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Step 4.4.1.1.3.1

Multiply $- 1$ by $- 8$ .

$t = - 42 + \frac{8 s}{15} + 8 (\frac{94}{15}) + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.1.3.2

Combine $8$ and $\frac{94}{15}$ .

$t = - 42 + \frac{8 s}{15} + \frac{8 \cdot 94}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.1.3.3

Multiply $8$ by $94$ .

$t = - 42 + \frac{8 s}{15} + \frac{752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 + \frac{8 s}{15} + \frac{752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = - 42 + \frac{8 s}{15} + \frac{752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.2

To write $- 42$ as a fraction with a common denominator, multiply by $\frac{15}{15}$ .

$t = \frac{8 s}{15} - 42 \cdot \frac{15}{15} + \frac{752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.3

Combine $- 42$ and $\frac{15}{15}$ .

$t = \frac{8 s}{15} + \frac{- 42 \cdot 15}{15} + \frac{752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.4

Combine the numerators over the common denominator.

$t = \frac{8 s}{15} + \frac{- 42 \cdot 15 + 752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.5

Simplify the numerator.

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Step 4.4.1.5.1

Multiply $- 42$ by $15$ .

$t = \frac{8 s}{15} + \frac{- 630 + 752}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.5.2

Add $- 630$ and $752$ .

$t = \frac{8 s}{15} + \frac{122}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = \frac{8 s}{15} + \frac{122}{15} + s$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.6

To write $s$ as a fraction with a common denominator, multiply by $\frac{15}{15}$ .

$t = \frac{8 s}{15} + s \cdot \frac{15}{15} + \frac{122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.7

Simplify terms.

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Step 4.4.1.7.1

Combine $s$ and $\frac{15}{15}$ .

$t = \frac{8 s}{15} + \frac{s \cdot 15}{15} + \frac{122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.7.2

Combine the numerators over the common denominator.

$t = \frac{8 s + s \cdot 15}{15} + \frac{122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.7.3

Combine the numerators over the common denominator.

$t = \frac{8 s + s \cdot 15 + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = \frac{8 s + s \cdot 15 + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.8

Move $15$ to the left of $s$ .

$t = \frac{8 s + 15 s + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 4.4.1.9

Add $8 s$ and $15 s$ .

$t = \frac{23 s + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = \frac{23 s + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = \frac{23 s + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = \frac{23 s + 122}{15}$

$- \frac{2 (7 s + 108)}{5} = - 32$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5

Solve for $s$ in $- \frac{2 (7 s + 108)}{5} = - 32$ .

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Step 5.1

Multiply both sides of the equation by $- \frac{5}{2}$ .

$- \frac{5}{2} \cdot (- \frac{2 (7 s + 108)}{5}) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

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 $- \frac{5}{2} (- \frac{2 (7 s + 108)}{5})$ .

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Step 5.2.1.1.1

Cancel the common factor of $5$ .

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Step 5.2.1.1.1.1

Move the leading negative in $- \frac{5}{2}$ into the numerator.

$\frac{- 5}{2} \cdot (- \frac{2 (7 s + 108)}{5}) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.1.2

Move the leading negative in $- \frac{2 (7 s + 108)}{5}$ into the numerator.

$\frac{- 5}{2} \cdot \frac{- 2 (7 s + 108)}{5} = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.1.3

Factor $5$ out of $- 5$ .

$\frac{5 (- 1)}{2} \cdot \frac{- 2 (7 s + 108)}{5} = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.1.4

Cancel the common factor.

$\frac{5 \cdot - 1}{2} \cdot \frac{- 2 (7 s + 108)}{5} = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.1.5

Rewrite the expression.

$\frac{- 1}{2} \cdot (- 2 (7 s + 108)) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$\frac{- 1}{2} \cdot (- 2 (7 s + 108)) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.2

Cancel the common factor of $2$ .

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Step 5.2.1.1.2.1

Factor $2$ out of $- 2 (7 s + 108)$ .

$\frac{- 1}{2} \cdot (2 (- (7 s + 108))) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.2.2

Cancel the common factor.

$\frac{- 1}{2} \cdot (2 (- (7 s + 108))) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.2.3

Rewrite the expression.

$7 s + 108 = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.3

Multiply.

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Step 5.2.1.1.3.1

Multiply $- 1$ by $- 1$ .

$1 (7 s + 108) = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.1.1.3.2

Multiply $7 s + 108$ by $1$ .

$7 s + 108 = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = - \frac{5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.2

Simplify the right side.

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Step 5.2.2.1

Simplify $- \frac{5}{2} \cdot - 32$ .

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Step 5.2.2.1.1

Cancel the common factor of $2$ .

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Step 5.2.2.1.1.1

Move the leading negative in $- \frac{5}{2}$ into the numerator.

$7 s + 108 = \frac{- 5}{2} \cdot - 32$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.2.1.1.2

Factor $2$ out of $- 32$ .

$7 s + 108 = \frac{- 5}{2} \cdot (2 (- 16))$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.2.1.1.3

Cancel the common factor.

$7 s + 108 = \frac{- 5}{2} \cdot (2 \cdot - 16)$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.2.1.1.4

Rewrite the expression.

$7 s + 108 = - 5 \cdot - 16$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = - 5 \cdot - 16$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.2.2.1.2

Multiply $- 5$ by $- 16$ .

$7 s + 108 = 80$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = 80$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = 80$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s + 108 = 80$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.3

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

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Step 5.3.1

Subtract $108$ from both sides of the equation.

$7 s = 80 - 108$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.3.2

Subtract $108$ from $80$ .

$7 s = - 28$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$7 s = - 28$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.4

Divide each term in $7 s = - 28$ by $7$ and simplify.

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Step 5.4.1

Divide each term in $7 s = - 28$ by $7$ .

$\frac{7 s}{7} = \frac{- 28}{7}$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.4.2

Simplify the left side.

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Step 5.4.2.1

Cancel the common factor of $7$ .

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Step 5.4.2.1.1

Cancel the common factor.

$\frac{7 s}{7} = \frac{- 28}{7}$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.4.2.1.2

Divide $s$ by $1$ .

$s = \frac{- 28}{7}$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$s = \frac{- 28}{7}$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$s = \frac{- 28}{7}$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 5.4.3

Simplify the right side.

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Step 5.4.3.1

Divide $- 28$ by $7$ .

$s = - 4$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$s = - 4$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$s = - 4$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

$s = - 4$

$t = \frac{23 s + 122}{15}$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 6

Replace all occurrences of $s$ with $- 4$ in each equation.

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Step 6.1

Replace all occurrences of $s$ in $t = \frac{23 s + 122}{15}$ with $- 4$ .

$t = \frac{23 (- 4) + 122}{15}$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 6.2

Simplify the right side.

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Step 6.2.1

Simplify $\frac{23 (- 4) + 122}{15}$ .

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Step 6.2.1.1

Simplify the numerator.

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Step 6.2.1.1.1

Multiply $23$ by $- 4$ .

$t = \frac{- 92 + 122}{15}$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 6.2.1.1.2

Add $- 92$ and $122$ .

$t = \frac{30}{15}$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = \frac{30}{15}$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 6.2.1.2

Divide $30$ by $15$ .

$t = 2$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = 2$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

$t = 2$

$s = - 4$

$r = - \frac{s}{15} - \frac{94}{15}$

Step 6.3

Replace all occurrences of $s$ in $r = - \frac{s}{15} - \frac{94}{15}$ with $- 4$ .

$r = - \frac{- 4}{15} - \frac{94}{15}$

$t = 2$

$s = - 4$

Step 6.4

Simplify the right side.

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Step 6.4.1

Simplify $- \frac{- 4}{15} - \frac{94}{15}$ .

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Step 6.4.1.1

Combine the numerators over the common denominator.

$r = \frac{4 - 94}{15}$

$t = 2$

$s = - 4$

Step 6.4.1.2

Simplify the expression.

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Step 6.4.1.2.1

Subtract $94$ from $4$ .

$r = \frac{- 90}{15}$

$t = 2$

$s = - 4$

Step 6.4.1.2.2

Divide $- 90$ by $15$ .

$r = - 6$

$t = 2$

$s = - 4$

$r = - 6$

$t = 2$

$s = - 4$

$r = - 6$

$t = 2$

$s = - 4$

$r = - 6$

$t = 2$

$s = - 4$

$r = - 6$

$t = 2$

$s = - 4$

Step 7

List all of the solutions.

$r = - 6, t = 2, s = - 4$