Anna wants to take fitness classes. She compares two gyms to determine which would be the best deal for her. Fit fast charges a set fee per class. Stepping up charges a monthly fee, plus an additional fee per class. What is the system of equations representing these costs? y = 5. 5x and y = 7. 5x + 10 y = 7. 5x and y = 5. 5x y = 7. 5x and y = 5. 5x + 10 y = 7. 5x + 10 and y = 5. 5x + 10.