For the following question, define the variables (statements of “Let ___ be …”) and write the two equations for the linear system. You do NOT need to solve the problem.

A teacher plans to buy books for her class. She has 28 students and wants to buy a book for each one of them. The books cost $5 each for soft covers and $8 each for hardcovers. The teacher has $173 to spend. How many of each type of book can she buy