SOLUTION: A mixture of 6% disinfectant solution is to be made from 7% and 3% disinfectant solutions. How much of each solution should be used if 36 gallons of 6% solution are needed?

Question 671418: A mixture of 6% disinfectant solution is to be made from 7% and 3% disinfectant solutions. How much of each solution should be used if 36 gallons of 6% solution are needed?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A mixture of 6% disinfectant solution is to be made from 7% and 3% disinfectant solutions. How much of each solution should be used if 36 gallons of 6% solution are needed?
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t = amount of 3%
s = amount of 7%
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t + s = 36 (total solution)
3t + 7s = 6*36 (total amount of disinfectant)

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