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$\"\"$

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The function is $\"f$ .

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$\"\"$

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

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

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$\"\"$ (Subtract 4 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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$\"\"$

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

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

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$\"\"$ (Cancel common terms)

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

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$\"\"$

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The value of x is $\"\"$ .

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