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11

Step-by-step Answer
PAGE: 247SET: ExercisesPROBLEM: 11
Please look in your text book for this problem Statement

The inequlaity is .

Apply subtraction property of inequality: Subtract 18 from each side.

            (Apply additive inverse property: )

                  (Apply additive identity property: )

                          (Subtract: )

Check:

To substitute a number less than 22 in .

                (Substitute a = 21)

                        (Add: 21 + 18 = 39)

The inequality is true

The inequality solution set is .



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