SOLUTION: How much water must be added to 9 litres of a solution containing 65% alcohol to obtain a solution containing 45% alcohol?

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Question 402068: How much water must be added to 9 litres of a solution containing 65% alcohol to obtain a solution containing 45% alcohol?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
9*.65=5.85
5.85=.45(9+x)
5.85=4.05+.45x
.45x=1.80
x=4 L of water
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Ed