### Home > CC3 > Chapter Ch7 > Lesson 7.2.1 > Problem 7-42

7-42.

Simplify the following expressions.

Change to addition.

Find a common denominator.

Find a common denominator.

Refer to part (a).

Recall that adding a negative number is essentially subtraction.

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

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