Question

as many bags of chips as popcorn. How many bags of chips did he buy?
Stu bought chips, popcorn, and pretzels for a picnic. Altogether he bought 15 bags. He bought 3 bags of pretzels and three times as many bags of chips as popcorn. How many bags of chips did he buy?

Answer 1

He bought 3 bags of pretzels, 3 bags of popcorn, 9 bags of chips. :)

Answer 2

C + p + z = 15
z = 3
c = 3p

3p + p + 3 = 15
4p + 3 = 15
4p = 15 - 3
4p = 12
p = 12/4
p = 3.....he bought 3 bags of popcorn

c = 3p
c = 3(3)
c = 9 <== he bought 9 bags of chips