### Home > AC > Chapter 4 > Lesson 4.1.2 > Problem 4-13

4-13.

Simplify as much as possible and then solve for

.Right now the equation is:

Flip subtraction to addition.

Remove zero pairs.

Combine like terms.

Add

to both sides. Subtract

from both sides.Divide by

on both sides. Check your solution.

Substitute your answer from part (a) into the original equation.