SOLUTION: the radiator of an automobile has a capacity of 16 quarts. it is presently filled with a 20% antifreeze solution. how many quarts must be drained and replaced with pure antifreeze

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Question 941307: the radiator of an automobile has a capacity of 16 quarts. it is presently filled with a 20% antifreeze solution. how many quarts must be drained and replaced with pure antifreeze to make the radiator contain a 50% antifreeze solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The very common radiator drain&replace problem
http://www.algebra.com/my/drain-and-replace-antifreeze.lesson?content_action=show_dev