SOLUTION: Find how many quarts of 4% butterfat milk and 1% butterfat milk should be mixed to yield 60 quarts of 2% butterfat milk.

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Question 374252: Find how many quarts of 4% butterfat milk and 1% butterfat milk should be mixed to yield 60 quarts of 2% butterfat milk.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
0.04x + 0.01(60-x) = 0.02*60
0.04x + 0.6 - 0.01x = 1.2,
0.03x = 0.6,
x = 20 quarts, the amount of 4% butterfat milk, and
60 - 20 = 40 quarts, the amount of 2% butterfat milk.