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Home > CC3 > Chapter 7 > Lesson 7.2.1 > Problem 7-42


Simplify the following expressions. 

  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.