SOLUTION: Find how many quarts of 5​% butterfat milk and 1​% butterfat milk should be mixed to yield 120 quarts of 4​% butterfat milk. The mixture should contain ___ q

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Question 1108807: Find how many quarts of 5​% butterfat milk and 1​% butterfat milk should be mixed to yield 120 quarts of 4​% butterfat milk.
The mixture should contain
___ quarts of the 5​% butterfat milk.

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x quarts of the 5% fat
120-x quarts of 1% fat

5x%2B1%28120-x%29=4%2A120
-
5x%2B120-x=480
4x=480-120
x=120-30
highlight%28x=90%29-------quarts of the 5% butterfat milk
.
.