Question 1145340
Pat is mixing two sulfuric acid solutions, one 40% and one 10%. To get 15 liters of a solution that is 30%
sulfuric acid, how much of each must she use?
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f = amount of 40%
t = amount of 10%
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f + t = 15  --- total solution
40f + 10t = 15*30 --- total acid