This Instructional Activity is a part of the Lesson 29, Unit 4, Grade 8. The sum of two numbers is 361, and the difference between the two numbers is 173. What are the two numbers? Together, we will read a word problem and work toward finding the solution. Provide students time to work independently or in pairs to solve this problem. Have students share their solutions and explain how they arrived at their answers. Then, show how the problem can be solved using a system of linear equations.