$\"\"$

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The equation is $\"\"$ .

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

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$\"\"$

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$\"\"$

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Subtract 1 from each side.

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$\"\"$

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

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Combine like terms using distributive property: $\"\"$ .

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$\"\"$

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$\"\"$

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Subtract 7y from each side.

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$\"\"$

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

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Combine like terms using distributive property: $\"\"$ .

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$\"\"$

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$\"\"$

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Divide each side by negative 2.

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$\"\"$

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$\"\"$

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The value of y is 4. $\"\"$

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The solution is D.