i need help with this math

Question

Ben went bowling with his friends. The bowling alley charges $22 for an hour of group bowling plus a fee to rent each pair of shoes. Ben's group bowled for one hour, rented 5 pairs of shoes, and paid a total of $37. What is the fee to rent each pair of shoes?

Answer 1

C(s) = 22 +3s with C measured in dollars and s = number of shoe pairs rented

37 = 22+3s

3s =37-22 = 15

s = 15/3 = 5 pairs of shoes rented at $3 per pair