SOLUTION: How many litersof 20%alcohol solution should be added to 40 liters of 50%solution to make 30% solution

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Question 771704: How many litersof 20%alcohol solution should be added to 40 liters of 50%solution to make 30% solution
Answer by Alan3354(69443) About Me  (Show Source):
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How many litersof 20%alcohol solution should be added to 40 liters of 50%solution to make 30% solution
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40*50 + x*20 = (40+x)*30