A dairy needs 225 gallons of milk containing 6% butterfat. How many gallons each of milk containing 8% butterfat and milk containing 2% butterfat must be used to obtain the desired 225 gallons?

Answer 1

8 -6= 2, 6-2 = 4

4/2= 2/1= 2 they need twice as much 8% as 2%

x/225 x = 2

x = 450 -2x

3x = 450, x = 150 gallons of 8%, 75 gallons of 2%