SOLUTION: how much 25% glucose solution must be mixed with how much 20% glucose to make 60 liters of 24% glucose

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Question 746723: how much 25% glucose solution must be mixed with how much 20% glucose to make 60 liters of 24% glucose
Answer by josgarithmetic(39617) About Me  (Show Source):
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how much v, of H% glucose solution must be mixed with how much u, of L% glucose to make M liters of T% glucose? ______ L%3CT%3CH. _____u and v are in liters.

%28Lu%2BHv%29%2FM=T and u%2Bv=M
The unknown variables are u and v.
Solve this system for u and v.