SOLUTION: How much of a 10% alcohol solution should be added to 2 cups of a 20% alcohol solution to make a 12% solution?

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Question 1042490: How much of a 10% alcohol solution should be added to 2 cups of a 20% alcohol solution to make a 12% solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How much of a 10% alcohol solution should be added to 2 cups of a 20% alcohol solution to make a 12% solution?
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alc + alc = alc
0.10x + 0.20*2 = 0.12(x+2)
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10x + 20*2 = 12x + 12*2
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2x = 8*2
x = 8 cups (amt. of 10% needed)
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Cheers,
Stan H.
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