### Home > MC1 > Chapter 5 > Lesson 5.2.2 > Problem 5-56

5-56.

If you are having trouble starting this problem, refer to problem 4-122.

4*x* + 9 or *x* + *x* + *x* + *x* + 9

You can also refer to problem 4-122 for this problem, but be aware that there are two different variables which represent two different lengths.