SOLUTION: A dairy had 50 gallons of milk that is 7.8% butterfat. How many gallons of milk that is 2.2%butterfatshould be added to the 50 gallons to make a milk that is 4.2% butterfat.

Question 589630: A dairy had 50 gallons of milk that is 7.8% butterfat. How many gallons of milk that is 2.2%butterfatshould be added to the 50 gallons to make a milk that is 4.2% butterfat.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
-------------- percent ---------------- Amount
Chemical I 7.8 ---------------- 50 gallons
Chemical II 2.2 ---------------- x gallons
Total 4.2 ---------------- 50+xgallons

7.8*50+2.2x=4.2(50+x)
390+2.2x =210+4.2 x
2.2x -4.2x=-390+210
-2x=-180
/ -2
x=90 gallons Chemical II
90 gallons Chemical I
m.ananth@hotmail.ca

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