Question

You are buying decorations for a birthday party. Six rolls of crepe paper and 20 balloons cost $11.90. After you start decorating, you need more supplies. You buy 2 more rolls of crepe paper and 15 more balloons for $6.05. How much did each roll of crepe paper cost?

Answer 1

Let's let

C = Creepers

B = Balloons

1) 6C + 20B = 11.9

2) 2C + 15B = 6.05

Eliminate

16C + 20B = 11.9 x3

-2C + 15B = 6.05 x4

18C + 60B = 35.7

-8C + 60B = 24.2

10C/10 = 11.5/10

C = 1.15