### Home > CC2MN > Chapter 9 > Lesson 9.3.2 > Problem 9-110

9-110.

Mrs. Chen has two brothers. Mark is

What are the equations you can write to relate the ages of Mrs. Chen, Mark, and Eric? How can you use these equations to find Mrs. Chen's age?

If ,

*, and*

*one of the equations is*

*.*

Can you find the others?

Mrs. Chen is