SOLUTION: How many gallons of cream that is 24% butterfat must be mixed with milk that is 2% butterfat to get 22 gallons of milk containing 4% butterfat?

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Question 795689: How many gallons of cream that is 24% butterfat must be mixed with milk that is 2% butterfat to get 22 gallons of milk containing 4% butterfat?
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
{amount of butter fat}/{amount of mixture}={concentration of butterfat}
{cream1+cream2}={total cream mixture}

u = gallons of 24% butterfat
v = gallons of 2% butterfat

and

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