SOLUTION: FIND HOW MANY QUARTS OF 6% BUTTERFAT MILK AND 2% BUTTERFAT MILK SHOULD BE MIXED TOGETHER TO YIELD 80 QUARTS OF 4% BUTTERFAT MILK?

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Question 807371: FIND HOW MANY QUARTS OF 6% BUTTERFAT MILK AND 2% BUTTERFAT MILK SHOULD BE MIXED TOGETHER TO YIELD 80 QUARTS OF 4% BUTTERFAT MILK?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=80,
.06x+.02y=.04*80
x=40., y=40.