$\"\"$

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The equation is $\"\"$ .

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

\

$\"\"$

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

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Add 6 to each side.

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$\"\"$

\

$\"\"$

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Divide each side by 9.

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is C.