SOLUTION: A cleaner needs 10 liters of 40% acid solution. Only 25% and 50% solutions are available. How much of each solution should be mixed?

Question 974892: A cleaner needs 10 liters of 40% acid solution. Only 25% and 50% solutions are available. How much of each solution should be mixed?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
ONE single unknown variable, for the volume v of the 25% acid. This means 10-v is the volume of the 50% acid.

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