Question 495970: how many quarts of pure antifreeze must be added to 2 quarts of a 10% antifreeze to obtain 20% antifreeze solution Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website! how many quarts of pure antifreeze must be added to 2 quarts of a 10% antifreeze to obtain 20% antifreeze solution
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Let x = amount (quarts) of pure antifreeze to add
then
x + .10(2) = .20(x+2)
x + .20 = .20x+.40
.80x + .20 = .40
.80x = .20
x = 0.25 quarts
