### Home > AC > Chapter 3 > Lesson 3.1.2 > Problem 3-13

3-13.

Write the equation represented in each diagram below on your paper. For each part, simplify as much as possible and then solve for . Be sure to record your work on your paper.

*3-13a HW eTool*(CPM)Write the original equation.

Flip subtraction to addition.

Remove zero pairs.

Combine like terms.

Remove an

-tile from both sides. Add

to both sides. Divide by

on both sides.

*3-13b HW eTool*(CPM)Follow steps similar to part (a).

Use the eTools below to help solve the problems.

Click the link at right for the full version of the eTool: *3-13a HW eTool* (CPM)

Click the link at right for the full version of the eTool: *3-13b HW eTool* (CPM)