\"\"\"\"\"\"

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The inequality is \"\".

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Apply subtraction property of inequality: Subtract 15 from each side.

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\"\"

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Apply commutative property of addition: a + b = b + a.

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\"\"

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\"\"   (Apply additive inverse property:  \"\")

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\"\"         (Apply additive identity property: \"\")

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

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Apply subtraction property of inequality: Subtract 3b from each side.

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\"\"

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\"\"           (Apply additive inverse property:  \"\")

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\"\"                 (Apply additive identity property: \"\")

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

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Apply division property of inequality: Divide each side by 21.

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\"\"

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\"\"                                  (Cancel common terms)

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\"\"

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\"\"

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

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

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The inequality solution set is \"\".