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

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The equation is $\"\"$

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According to multiplication property of equality: Multiply each side by $\"\"$ .

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$\"\"$

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$\"\"$ (Cancel common terms)

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

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According to addition property of equality: Add $\"\"$ 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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According to division property of equality:If $\"\"$ then $\"\"$ .

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$\"\"$ (Divide each side by 3a)

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

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The value of $\"\"$ .