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

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The equation is $\"\"$ .

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$\"\"$ (Add $\"\"$ to each side)

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) \ \ $\"\"$

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$\"\"$ (Subtract $\"\"$ from each side)

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$\"\"$ (Commutative property of Addition: $\"\"$ )

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Additive identity property: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ ) \ \ $\"\"$ $\"\"$ (Multiply each side by 12)

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$\"\"$ (Cancel common terms)

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

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Check:

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

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$\"\"$ (Substitute $\"\"$ )

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

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

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$\"\"$ (Add: $\"\"$ )

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

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Compare the values, the equation is true. The solution is $\"\"$ . $\"\"$

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The value of $\"\"$ .