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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
2x + 10 = 24

Then solve for x:
2x = 14
x = 7

x = 7

Use the same method as part (a).