SOLUTION: You have 8 liters of a 30% alcohol solution. To make a 5% alcohol solution, how many liters of pure water do you need to add?

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Question 745776: You have 8 liters of a 30% alcohol solution. To make a 5% alcohol solution, how many liters of pure water do you need to add?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
H=30%
B=8 liters
T=5%
w= unknown liters to add to make T concentration

(Intended component)/(amount of mixture)=resulting concentration
H%2AB%2F%28B%2Bw%29=T
H%2AB=T%28B%2Bw%29
H%2AB=B%2AT%2BTw
H%2AB-T%2AB=Tw
highlight%28w=B%2A%28H-T%29%2FT%29