### Home > MC2 > Chapter 6 > Lesson 6.2.7 > Problem 6-138

6-138.

For each equation below, solve for *.* Sometimes the easiest

**strategy**is to use mental math.

Isolate the

variable.

What number do you need to divide both sides by to isolate the

variable?What is

divided by ?

Subtract

from both sides to isolate .

Notice that both sides are divided by

.