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

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The equation is $\"\"$ .

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Apply multiplication Property of equality: Multiply each side by 3.

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$\"\"$

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$\"\"$ (Cancel common terms)

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

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Apply division Property of equality: Divide each side by 2.

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$\"\"$

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$\"\"$ (Cancel common terms)

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

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Check:

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

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$\"\"$

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

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

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Compare the values, the equation is true.

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$\"\"$

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The value of n is 21.