### Home > MC1 > Chapter 8 > Lesson 8.3.1 > Problem 8-80

8-80.

How are the two lines related?

How will this help you write an equation?

Because the two lines are equal, you can write the equation: *x* + *x* + 10 = 24

Combine like terms

2*x* + 10 = 24

Then solve for *x*:

2*x* = 14*x* = 7

*x* = 7

Use the same method as part (a).