SOLUTION: I cant figure this out? HELP thanks A dairy has 50 gallons of milk that is 7.8% butterfat. How many gallon of milk that is 2.2% butterfat should be added to the 50 gallons to ma

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Question 295593: I cant figure this out? HELP thanks
A dairy has 50 gallons of milk that is 7.8% butterfat. How many gallon of milk that is 2.2% butterfat should be added to the 50 gallons to make a milk that is 4.2% butterfat?
Answer by richwmiller(9135) About Me  (Show Source):
You can put this solution on YOUR website!
"I cant figure this out? HELP thanks"
Let analyze the implications of your statement.
You state that you can't figure this out.
Would anyone post a problem if they could?
Why are you waking me up with HELP. Please stop yelling. I have a headache and the baby is asleep.
Thanks is good.
.078*50+.022*x=.042*(x+50)
x=90