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7-42.

Simplify the following expressions. Homework Help ✎

  1. Change to addition.

    Find a common denominator.

  1. Find a common denominator.

  1. Refer to part (a).

  1. Recall that adding a negative number is essentially subtraction.

  1. Remember that when you subtract a negative number you are essentially adding it.

  1. Remember, the solution will have the same sign as the larger number.