How many gallons of 27% butterfat cream must be mixed with 500 gallons of 3% butterfat milk to obtain a 7% butterfat milk?

__________ gallons of 27% butterfat cream.

Question

How many gallons of 27% butterfat cream must be mixed with 500 gallons of 3% butterfat milk to obtain a 7% butterfat milk?
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__________ gallons of 27% butterfat cream.

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The Answer of How many gallons of 27% butterfat cream must be mixed with 500 gallons of 3% butterfat milk to obtain a 7% butterfat milk?
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__________ gallons of 27% butterfat cream.

How Many Gallons of 27% Butterfat Cream Must Be Mixed