$\"\"$

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The equation is $\"\"$

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Subtraction property of equality: if $\"\"$ , then $\"\"$ .

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$\"\"$ (Subtract 7 from both sides)

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

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$\"\"$ (Subtract: $\"\"$ . Add: $\"\"$ )

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$\"\"$

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Division property of equality:

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For any real numbers a, b and c, with $\"\"$ , if $\"\"$ then $\"\"$ \ \

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$\"\"$ (Divide each side by 5)

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$\"\"$ (Cancel equal terms)

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$\"\"$ \ \

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$\"\"$

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Check:

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

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$\"\"$

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

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

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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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