SOLUTION: how many ounces of a 20% alcohol solution must be mixed with 17 ounces of 25% alcohol solution to make 21%

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Question 790032: how many ounces of a 20% alcohol solution must be mixed with 17 ounces of 25% alcohol solution to make 21%
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
u = How many ounces of 20% alcohol
highlight%28%2820u%2B25%2A17%29%2F%28u%2B17%29=21%29