SOLUTION: How much water must be evaporated from 14 qt of a 45% antifreeze solution to produce a 70% solution?

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Question 263427: How much water must be evaporated from 14 qt of a 45% antifreeze solution to produce a 70% solution?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
14*.45=.70x
x=9
14-9=5 qts to evaporate