$\"\"$ \ \

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The equation is $\"\"$

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$\"\"$ (Apply distributive property: $\"\"$ )

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$\"\"$ (Multiply:7(1) =7; 3(5) =15)

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

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$\"\"$ (Apply Commutative property: a + b =b + a)

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

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$\"\"$ \ \

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$\"\"$ (Subtract 7 from each side)

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

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$\"\"$ (Divide each side by4)

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$\"\"$ (Cancel common terms)

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ \ \

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Verify:

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

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$\"\"$

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

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

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

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$\"\"$ \ \

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The solution is $\"\"$ .

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