SOLUTION: How many liters of a 20% alcohol should be added to an 80% alcohol solution to obtain 15 liters of a 60% alcohol solution?

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Question 939627: How many liters of a 20% alcohol should be added to an 80% alcohol solution to obtain 15 liters of a 60% alcohol solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many liters of a 20% alcohol should be added to an 80% alcohol solution to obtain 15 liters of a 60% alcohol solution?
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Equation::
alch + alch = alch
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0.20x + 0.80(15-x) = 0.60*15
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20x + 80*15 - 80x = 60*15
-60x = -20*15
x = (1/3)15
x = 5 liters (amt. of 20% solution needed)
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Cheers,
Stan H.
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