SOLUTION: How much of a solution that is 30% alcohol must be added to 55 liters of a solution that is 60% alcohol to obtain a solution that is 40% alcohol?

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Question 819746: How much of a solution that is 30% alcohol must be added to 55 liters of a solution that is 60% alcohol to obtain a solution that is 40% alcohol?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
30w + 60(55) = 40(w + 55)
30w + 3300 = 40w + 2200
10w = 1100
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w = 110 L
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