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

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The equation is $\"\"$

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According to Subtraction property of equality: Subtract 3d 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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According to addition property of equality: Add 5 to each side.

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$\"\"$

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

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

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

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$\"\"$ (Divide each side by 4)

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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 7.5, in $\"\"$ .

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

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

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

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The equlity is true

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$\"\"$

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The inequality solution is $\"\"$ .

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