SOLUTION: A 20 gallon solution contains 50% salt. How much pure water needs to be added in it to get a solution that contains 30% salt?

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Question 402313: A 20 gallon solution contains 50% salt. How much pure water needs to be added in it to get a solution that contains 30% salt?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A 20 gallon solution contains 50% salt.
How much pure water needs to be added in it to get a solution that contains 30% salt?
:
Let x = amt of pure water
.50(20) = .30(x+20)
10 = .3x + 6
10 - 6 = .3x
x = 4%2F.3
x = 131%2F3 gal of water to be added