SOLUTION: How much water must be added to 200 gallons of mixture which is 80 percent alcohol to reduce it to a 75 percent mixture?

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Question 634765: How much water must be added to 200 gallons of mixture which is 80 percent alcohol to reduce it to a 75 percent mixture?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
from standpoint of water
200*.2+x=.25(200+x)
x=13 1/3
from view of alcohol
200*.80=.75(200+x)
x=13 1/3