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

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The equation is $\"\"$

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According to subtraction property of equality: Subtract 3 from each side.

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$\"\"$

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$\"\"$ (Apply Commutative property in addition: $\"\"$ )

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

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$\"\"$ (Apply additive idetity property in addition: $\"\"$

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$\"\"$ (Add: –1 – 3 = –4.)

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$\"\"$ (Multiply each side by 7.)

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$\"\"$

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

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

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

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$\"\"$ (Cancel comman terms)

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$

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Check:

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To verify the solution, substitute $\"\"$ in original equation.

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$\"\"$

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$\"\"$

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

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

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

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$\"\"$

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The value of $\"\"$ .

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