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

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The inequality $\"\"$ .

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Apply subtraction property of inequality: Subtract 9 from each side.

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$\"\"$

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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 3)

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$\"\"$ (Cancel common terms)

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

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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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$\"\"$

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

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Note: A Graph dot means that this point is included in the solution set.

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$\"\"$

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Check:

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To check, substitute a number $\"\"$ 18 or

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greater than or equal to $\"\"$ 18 in $\"\"$ .

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$\"\"$ (Substitute r = $\"\"$ 18)

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

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

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

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The inequality is true. $\"\"$

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The inequality solution is $\"\"$ .