For the following problem, apply all six steps of the process for solving systems of equations problems. The Math Club wants to order t-shirts to recognize students who improved their performance in Algebra I for their hard work and effort. Hot Shirts charges $10 per shirt with a $15 set up charge. T-Shirt World charges $5 per shirt with a $50 set up charge. For what number of shirts is the cost of ordering t-shirts the same at both stores? What is that cost?
a. Define the variables.

b. Write a system of equations to model the situation

. c. Solve the system using any method. Show your steps.