SOLUTION: A quiche recipe requires 2 cups of light cream that is 20% milk fat. In the refrigerator, Mark has half-and-half that is 12% milk fat and heavy cream that is 36% milk fat. How much

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Question 203840: A quiche recipe requires 2 cups of light cream that is 20% milk fat. In the refrigerator, Mark has half-and-half that is 12% milk fat and heavy cream that is 36% milk fat. How much of each of these should he use to obtain the necessary amount of light cream?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
let x=12%=1.33 cups
let 2-x=36%=.67 cups
.12x+.36(2-x)=2(.2)
.12x+.72-.36x=.4
-.24x=-.32
x=1.33