# SOLUTION: A mechanic is working on a car with a 20-qt radiator containing a 60% antifreeze solution. HOw much of the solution should he drain and replace with pure water to get a solution t

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 Question 123078: A mechanic is working on a car with a 20-qt radiator containing a 60% antifreeze solution. HOw much of the solution should he drain and replace with pure water to get a solution that is 50% antifreeze.Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!.6(20-X)=.5*20 12-.6X=10 -.6X=10-12 -.6X=-2 X=-2/-.6 X=3.33 QT NEEDS TO BE DRAINED & REPLACED WITH PURE WATER. PROOF .6(20-3.33)=.5*20 .6*16.67=10 10=10