SOLUTION: How much water must be added to 14 liters of a 90% acid solution to obtain a 40% acid solution?

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Question 832480: How much water must be added to 14 liters of a 90% acid solution to obtain a 40% acid solution?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
from water view
.1*14+x=.6*(14+x)
x = 17.5
or from acid view
.9*14=.4*(14+x)
x = 17.5