A 30% solution of fertilizer is to be mixed with a 60% solution of fertilizer in order to get 120 gallons of a 50% solution. How many gallons of the 30% solution and 60% sould should be mixed?
Let x gallon of 30% solution and y gallon of 60% solution be
30% of x+60% of y=50% of 120
Solving (1) and (2),
So we mix 40gallon 30% solution
and 80gallon 60% solution.
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