SOLUTION: what if the classes bought 120 containers and had 30 more cans than bags how many bags and how many cans and bags did they buy?

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Question 814645: what if the classes bought 120 containers and had 30 more cans than bags how many bags and how many cans and bags did they buy?
Answer by LinnW(1048) About Me  (Show Source):
You can put this solution on YOUR website!
set c = number of cans
b = number of bags
c + b = 120
c = b + 30 we need to add 30 to number of bags to make these equal
If we substitute ( b+30 ) for c in
c + b = 120 we have
(b+30) + b = 120
2b + 30 = 120
Subtract 30 from each side
2b = 120 - 30
2b = 90
b = 45
Since c = b+20
c = 45+20
c = 65