SOLUTION: How many quarts of water must be added to 13 qt of an 80% antifreeze solution to make a 65% antifreeze solution?

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Question 831073: How many quarts of water must be added to 13 qt of an 80% antifreeze solution to make a 65% antifreeze solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Two-part mixture problem, with the part to be added having 0% concentration.

See the lesson link in my profile and look for "Mixture: one material quantity unknown"

http://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev