SOLUTION: To make low-fat cottage cheese, milk containing 4% butterfat is mixed with milk containing 1% butterfat to obtain 39 gallons of a mixture containing 2% butterfat. How many gallons

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Question 345847: To make low-fat cottage cheese, milk containing 4% butterfat is mixed with milk containing 1% butterfat to obtain 39 gallons of a mixture containing 2% butterfat. How many gallons of each milk must be used?
gallons of milk containing 1% butterfat
2 gallons of milk containing 4% butterfat
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
x = gallons of 4%

(x)(4%) + (39 - x)(1%) = (39)(2%)