SOLUTION: How many liters of water must be added to 90 liters of an 80% solution of antifreeze and water to obtain a 60% antifreeze solution?

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Question 462627: How many liters of water must be added to 90 liters of an 80% solution of antifreeze and water to obtain a 60% antifreeze solution?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
90x.80=72
.60x=72
x=72/.60=120
Since you already have 90 liters of solution, you need to add 30 liters of pure water to get the desired mix.
90x.8=72
120x.60=72..