### Home > MC1 > Chapter 8 > Lesson 8.4.3 > Problem 8-131

8-131.

Think of the problem this way: what number do you have to add to 10 in order to get 2?

If 2*x* + 8 = 18, then 2*x* = 10. Why does this make sense?

By what number do you need to multiply 2 by in order to get 10?

*x* = 5