### Home > MC1 > Chapter 5 > Lesson 5.2.2 > Problem 5-57

5-57.

It may be helpful to look back at problem 4-123, since this problem is very similar to that one.

If the value of *x* in the expression you wrote in problem

5-56 is 20, can you find the total value? A diagram might be helpful here.

Use the re-labeled diagram below from problem 5-56 part (b) to help you solve this problem.