$\"\"$

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The equation is $\"\"$ .

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According to Subtraction property of equality; if a = b, then a(b + c).

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

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$\"\"$ (Additive inverse property: $\"\"$ )

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

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$\"\"$ (Add 5 to each side)

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$\"\"$ (Additive inverse property: $\"\"$ )

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

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$\"\"$ (Divide both sides by $\"\"$ )

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$\"\"$ (Cancel common terms)

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

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$\"\"$

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Verify the solution:

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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.

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$\"\"$

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The value of $\"\"$ .