SOLUTION: At a movie theater a couple buys on elarge popcorrn and two drinks for $9.00 a group of teenagers buy two large popcorn and five drinks for $20.50 find the cost of one large popcor

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Hi

Let x and y represent the cost of a popcorn and a drink respectively   

x + 2y = $9    ||multiplying thru by -2 to  eliminate the x variable by adding EQs

2x + 5y = $20.50

      y = $2.50  and x = $4.00