$\"\"$ $\"\"$ $\"\"$

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The equation is $\"\"$ .

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To solve an absolute value equation is $\"\"$ ,where c > o.

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First it can write two equations.

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Equation 1: $\"\"$

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$\"\"$

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Equation 2: $\"\"$

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$\"\"$ $\"\"$

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Solve equation 1 is $\"\"$ .

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Apply Subtraction property of equality: Subtract 20 from each side.

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$\"\"$

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Rearrange the terms using commutative property of addition: $\"\"$ .

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$\"\"$

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$\"\"$ (Subtract: $\"\"$ )

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Apply to division property of equality: Divide each side by negative 9.

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$\"\"$

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$\"\"$ (Cancel common terms) $\"\"$

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Solve equation 2 is $\"\"$ .

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$\"\"$ (Subtract 20 from each side)

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Rearrange the terms using commutative property of addition: $\"\"$ . $\"\"$

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$\"\"$ (Subtract: $\"\"$ )

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$\"\"$ (Divide each side by negative 9)

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$\"\"$ (Cancel comman terms) $\"\"$

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The solution set is $\"\"$ .