CPM Homework Help : CAAC Problem 3-13

Use the eTools below to help solve the problems.

Click the link at right for the full version of the eTool: AC 3-13a HW eTool

Step 1(a):

Flip subtraction to addition.

Step 2(a):

Remove zero pairs.

Step 3(a):

Combine like terms.

Step 4(a):

Remove an x-tile from both sides.

Step 5(a):

Add 2 to both sides.

Step 6(a):

Divide by 2 on both sides.

2x + 3 + (−x) + 1 = 2x + (−2) + x

2x + (−x) + 3 + 1 = 2x + x + (−2)

x + 3 + 1 = 2x + x + (−2)

x + 4 = 3x − 2

4 = 2x − 2

6 = 2x

Answer (a):

3 = x

Hint (b):

Follow the steps in part (a).

Click the link at right for the full version of the eTool: AC 3-13b HW eTool