# SOLUTION: A 100% concentrate is to be mixed with a mixture having a concentration of 40% to obtain 55 gallons of a mixture with a concentration of 75%. How much of the 100% concentrate will

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 Click here to see ALL problems on Mixture Word Problems Question 459743: A 100% concentrate is to be mixed with a mixture having a concentration of 40% to obtain 55 gallons of a mixture with a concentration of 75%. How much of the 100% concentrate will be needed? Answer by richwmiller(9132)   (Show Source): You can put this solution on YOUR website!.4x +y=.75*55 x+y=55 x=22.9167, y=32.0833