SOLUTION: How many kilograms of water must be evaporated from 50kg of 3% solutioN of salt so that the remaining portioN maybe 5% soluTioN?

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Question 633433: How many kilograms of water must be evaporated from 50kg of 3% solutioN of salt so that the remaining portioN maybe 5% soluTioN?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.03*50=.05*(50-x)
1.5=2.5-.05x
-1=.05x
100=5x
20=x