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

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The inequality is $\"\"$

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Apply subtraction property of inequality: Subtract 18 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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$\"\"$

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

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Note: A circle means that this point is not included in the solution set. $\"\"$

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Check:

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

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

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

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The inequality solution is $\"\"$ .