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

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The equation is $\"\"$

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

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Apply Subtracion property of equality: Subtract 3d from each side .

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$\"\"$

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$\"\"$

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$\"\"$ (Commutative property of addition: a + b = b + a)

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

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$\"\"$ (Subtract 40 from each side) $\"\"$ (Additive inverse property : $\"\"$ )

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

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

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$\"\"$ (Divide each side by 2)

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$\"\"$ (Cancel common terms)

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

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Graph the solution set on a number line $\"\"$

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Check:

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To check, substitute a number $\"\"$ , in $\"\"$ .

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

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

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

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The equlity is true $\"\"$

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The inequality solution is $\"\"$ .

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