SOLUTION: how much water and 70% isopropyl alcohol solution must be mixed together to get 14 liters of 45% isopropyl alcohol solution?

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Question 454744: how much water and 70% isopropyl alcohol solution must be mixed together to get 14 liters of 45% isopropyl alcohol solution?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
from isopropyl view
.7x=.45*14
x+y=14
x=9 liters of isopropyl
y=5 liters of water
from water view
.3x+y=.55*14
x+y=14
x=9 liters of isopropyl
y=5 liters of water