Wendy is a kickboxing instructor who will be teaching classes at a local gym. To get certified as an instructor, she spent a total of $100. Wendy will be earning a base salary of $70 per month from the gym, plus an additional $3 for every class she teaches. If Wendy teaches a certain number of classes during her first month as an instructor, she will earn back the amount she spent on certification. How much will Wendy's expenses and earnings be?
Write a system of equations, graph them, and type the solution.
