SOLUTION: How much water must be evaporated from 20 gallons of a 10% salt solution in order to obtain a 20% salt solution?

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Question 460253: How much water must be evaporated from 20 gallons of a 10% salt solution in order to obtain a 20% salt solution?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
.10*20=2 gallons of salt.
That leaves 18 gallons of water.
.2x=2
x=2/.2
x=10 gallons after evaporation.
18-10=8 gallons have to be evaporated to have a 20% salt solution.