At the local warehouse club where Billy buys supplies for his concession stand, a case of energy drinks cost twice as much as a case of water and a case of chips together. If a case of energy drinks costs $18 and a case of water costs $5, what is the cost of a case of chips?

Question

anonymous · Answer

c = chips
w = water
e = energy drink
2w + c = e
e = 18
w = 5
2(5) + c = 18
10 + c = 18
[subtract 10 from both sides]
c = 8