$\"\"$

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The equation is $\"\"$ .

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Apply multiplication property of equality: If a = b then $\"\"$ .

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$\"\"$ (Multiply each side by 8)

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$\"\"$ (Cancel common terms)

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

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Distribute terms using distributive property: $\"\"$ .

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$\"\"$

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

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Apply addition property of equality: If a = b then a + c = b + c.

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$\"\"$ (Add 2 to each side)

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

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$\"\"$ (Add: 10 + 2 = 12) $\"\"$

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Apply subtraction property of equality: If a = b then a $\"\"$ c = b $\"\"$ c.

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$\"\"$ (Subtract 2d from each side)

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

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

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Check:

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To check the solution, substitute $\"\"$ in $\"\"$ .

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$\"\"$

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

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

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$\"\"$ (Add: 12 + 5 = 7)

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

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

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The equality is true.

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$\"\"$

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The value of $\"\"$ .