CPM Homework Help : AC Problem 3-38

For the following equations, draw a picture of the tiles on an equation mat like the one shown at right. Then use “legal” moves to simplify and solve for the variable. Record your work.

Shaded tile is plus 1. Tile is negative 1. An equation mat with four sections.

$−2+x=−x+2$
Hint (a):

$2+3x=x+7$
Answer (b):
$x=2.5$

Use the eTools below to help solve the problems.
Click the link at right for the full version of the eTool: 3-38 HW eTool