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

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The equality is $\"\"$ .

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$\"\"$ (Apply distributive property: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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Apply addition property of equality: Add 8 to each side.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Apply additive identity property: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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Check:

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To check, substitute 12, in $\"\"$ .

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$\"\"$ (Substitute $\"\"$ )

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

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$\"\"$ (Multiply: $\"\"$ )

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The equality is true. $\"\"$

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The equality solution is $\"\"$ .