### Home > MC1 > Chapter 10 > Lesson 10.1.2 > Problem 10-25

10-25.

Find the value of the variable that makes each equation true.

If

, then .

Why does this make sense?If

, what must be equal to?

Try setting up a diagram to figure it out.What do you need to subtract from

to get ?

How can you use this to help figure out the value of?