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

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The equation is $\"\"$ .

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$\"\"$ (Distributive property: a(b + c) = ab + ac) $\"\"$ (Multiply: $\"\"$ )

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

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Apply subtraction property of equality: Subtract 1.5n from each side.

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$\"\"$ $\"\"$ $\"\"$ (Comutative property:a+b=b+a)

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

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$\"\"$ (Distributive property: $\"\"$ ) \ \

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

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$\"\"$ (Add 3 to each side )

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

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$\"\"$ (Add: 3 + 3 = 6)

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$\"\"$ (Divide each side by 1.5)

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$\"\"$ (Cancel common terms)

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

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Check:

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To check, substitute n = 4 in $\"\"$ .

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$\"\"$

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

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

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$\"\"$ (Multipliy: $\"\"$ )

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$\"\"$

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$\"\"$

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The solution of $\"\"$