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

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The given equation $\"\"$

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According to subtraction property of equality: Subtract 9 from each side

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$\"\"$

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$\"\"$ (Commutative property: $\"\"$ )

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

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

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

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

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$\"\"$ (Cancel common terms)

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

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To check the solution:-

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Substitute value n in original equation in $\"\"$ .

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$\"\"$

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

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

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The Solution is true. $\"\"$

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The Solution is $\"\"$ .