SOLUTION: 10 liter solution that is 30% alcohol is going to be dilluted to 20% alcohol by adding water how much is water is needed

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Question 910256: 10 liter solution that is 30% alcohol is going to be dilluted to 20% alcohol by adding water how much is water is needed
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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10 liter solution that is 30% alcohol is going to be diluted to 20% alcohol by adding water
how much is water is needed
:
let w = amt of water required to accomplish this
Use the decimal equiv of percent
.30(10) = .20(w+10)
3 = .2w + 2
3 - 2 = .2w
w = 1/.2
w = 5 liters of water