need help solve word problem

Question

Kevin went to Pizza Hut and bought some pizzas for lunch. The small one costs $12 and large one $16. He spent $92 total. How many pizzas did he buy?

Please provide details how you comes up with the solution. Thanks.

Answer 1

12s +16L = 92

divide by 4

3s +4L = 23

s L

1 5 3(1) + 4(5) = 3+20 = 23

5 2 3(5) + 4(2) = 15 +8 = 23

either 6 or 7 pizzas total, assuming no fractional pizzas