SOLUTION: A radiator contains 10 quarts of fluid, 25% of which is antifreeze. How much fluid should be drained and replaced with a fluid that is 90% antifreeze so that the resulting mixture

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Question 1133639: A radiator contains 10 quarts of fluid, 25% of which is antifreeze. How much fluid should be drained and replaced with a fluid that is 90% antifreeze so that the resulting mixture is 45% antifreeze? Give both the exact answer and a decimal approximation, rounded to two decimal places. Be sure to include appropriate
units.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
v, the volume to remove and replace, in quarts of volume.

%280.25%2A10-0.25v%2B0.9v%29%2F10=0.45