What’s 96 minus 4.5y minus 3.2y= 5.6y plus 42.80

I need help understanding on how to solve the equation

I’m not in Highschool, I’m in advanced 7th grade

3. mr. sanchez’s class sold fruit pies for $1.65 each and mr. kelly’s class sold bottles of fruit juice for $1.36 each. together, the classes sold 79 items and earned $118.17 for their school. (a) write and solve a system of equations that model the problem. show all your work. (b) which class earned more money? (c) how much more money did that class earn?