### Home > CC2 > Chapter 7 > Lesson 7.1.1 > Problem 7-13

7-13.

Copy and rewrite the following expressions by combining like terms, making zeros, and using the Distributive Property. Visualizing the expressions by using algebra tiles may be helpful.

Group like terms together.

Simplify.

Visualize eight negative

algebra tiles. What happens when you addunit tiles but then take of these unit tiles away?

See part (a).

Refer to the Math Notes.