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

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The given equation is $\"\"$ .

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According to subtraction property of equality: Subtract 7x from each side.

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$\"\"$

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Rearrange the terms using commutative property of addition: $\"\"$ .

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$\"\"$

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

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According to divison property of equality: Divide each side by negative "x".

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$\"\"$

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$\"\"$ (cancel comman terms) $\"\"$ $\"\"$ (Substitute x= $\"\"$ 4)

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

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

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

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The solution is $\"\"$ .

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