### Home > AC > Chapter 3 > Lesson 3.1.2 > Problem 3-15

3-15.

Copy and simplify the following expressions by combining like terms.

Flip subtraction to addition.

Combine like terms.

Remember that you cannot combine

and.

See the hint in part (a).

Remember that

cannot be combined withor.See the hints in part (a).

See the hints in part (a) and part (c).