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

3-13.

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Flip subtraction to addition.

Remove zero pairs.

Combine like terms.

Remove an x-tile from both sides.

Add 2 to both sides.

Divide by 2 on both sides.

2*x* + 3 + (−*x*) + 1 = 2*x* + (−2) + *x*

2*x* + (−*x*) + 3 + 1 = 2*x* + *x* + (−2)

*x* + 3 + 1 = 2*x* + *x* + (−2)

*x* + 4 = 3*x* − 2

4 = 2*x* − 2

6 = 2*x*

3 = *x*

Follow the steps in part (a).

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