Answer:
variable is number of balloons
b = balloons
b+10 = cupcakes
85 = 2b + 5b + 50 = 7b + 50
Explanation:
#cupcakes = 10 + b #balloons
total cost $85 = ($2 x b) + $5 x (b + 10)
balloons cupcakes
85 = 2b + 5b + 50 combine terms and subtract 50 from both sides of =
35 = 7b then divide both sides by 7
5 balloons
15 cupcakes