SOLUTION: How many gallons of cream that is 22% butterfat must be mixed with milk that is 2% butterfat to get 20 gallons of milk containing 4% butterfat? I've tried using my math book to

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How many gallons of cream that is 22% butterfat must be mixed with milk that is 2% butterfat to get 20 gallons of milk containing 4% butterfat? I've tried using my math book to       Log On

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Question 346902: How many gallons of cream that is 22% butterfat must be mixed with milk that is 2% butterfat to get 20 gallons of milk containing 4% butterfat?
I've tried using my math book to solve but this question is backwards from the example in the book.

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(22%)(x) + (2%)(20 - x) = (4%)(20)