$\"\"$

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The equation is $\"\"$ .

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Apply subtraction property of equality: If a = b then $\"\"$ .

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$\"\"$ (Subtract 3d from each side)

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Apply additive identity property: $\"\"$ )

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

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Apply addition property of equality: If a = b then a + c = b + c.

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$\"\"$ (Add 13 to each side)

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Apply additive identity property: $\"\"$ )

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

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Apply division property of equality: If a = b then $\"\"$ .

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$\"\"$ (Divide each side by 4)

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$\"\"$ (Cancel common terms)

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

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Check:

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To check, substitute $\"\"$ , in $\"\"$ .

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$\"\"$

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

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

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

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The equality is true. $\"\"$

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The solution is $\"\"$ .