$\"\"$

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The equation is $\"\"$ .

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$\"\"$ (Write the equation) \ \

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

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

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$\"\"$ (Apply additive identity property: $\"\"$ ) $\"\"$

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$\"\"$ (Multiply each side by multiplicative inverse of $\"\"$ )

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

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The solution is $\"\"$ . $\"\"$

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Check:-

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Substitute $\"\"$ in the equation.

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$\"\"$ (Write the equation)

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$\"\"$ (Substitute: $\"\"$ )

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$\"\"$ (Simplify: $\"\"$ )

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

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The solution is $\"\"$ .