popcorn problem

Question

Andy paid $22 for 2 movie tickets and a small box of popcorn. Laurie paid $31 for 3 movie tickets and a small box of popcorn. How much is the popcorn?

Answer 1

Let x = the price of one movie ticket

Let y = the price of a small popcorn

3x + y = 31

2x + y = 22       Subtract the two equations.

        x = 9

2(9) + y = 22

  18 + y = 22

          y = $4