SOLUTION: A physicist needs 80 liters of a 30% acid solution. He has a 20% acid solution and a 60% acid solution. How many liters of each 20% and 60% does he need to total 80 liters of a 3

Question 753913: A physicist needs 80 liters of a 30% acid solution. He has a 20% acid solution and a 60% acid solution. How many liters of each 20% and 60% does he need to total 80 liters of a 30% acid solution?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
A physicist needs M liters of a T% acid solution. He has a L% acid solution and a H% acid solution. How many liters of each L% and H% does he need to total M liters of a T% acid solution?

Let u = liters of L%
Let v = liters of H%

and
The only unknowns are u and v. Solve this system for u and v.
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