$\"\"$

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The equation is $\"\"$ .

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Divide each side by 5.

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$\"\"$

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

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Case:1 a = b.

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$\"\"$

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Multiply each side by 5.

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$\"\"$

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$\"\"$

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Apply distributive property: a( b + c) = ab + ac.

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$\"\"$

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$\"\"$

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Subtract x from each side.

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$\"\"$

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$\"\"$

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Subtract 20 from each side.

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$\"\"$

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$\"\"$

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Divide each side by 14.

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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Case:2 a = $\"\"$ b.

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$\"\"$

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Multiply each side by 5.

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$\"\"$

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$\"\"$

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$\"\"$

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Apply distributive property: a( b + c) = ab + ac.

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$\"\"$

\

$\"\"$

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Add x to each side.

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$\"\"$

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$\"\"$

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Add 20 to each side.

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$\"\"$

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$\"\"$

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Divide each side by 16.

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$\"\"$

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$\"\"$ .

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$\"\"$

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The solution set is $\"\"$ .

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