SOLUTION: how many pints of disinfectant that is 74% alcohol must be mixed with 5 pints of one that is 90% alcohol to obtain a disinfectant that contains 84% alcohol?

Question 978701: how many pints of disinfectant that is 74% alcohol must be mixed with 5 pints of one that is 90% alcohol to obtain a disinfectant that contains 84% alcohol?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = pints of 74% disinfectant needed
= pints of alcohol in 74% disinfectant
= pints of alcohol in 90% diinfectant
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3 pints of 74% disinfectant are needed
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check:

OK
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