Algebra
posted by Jon .
Soybean meal is 16% protein; cornmeal is 8% protein. How many pounds of each should be mixed together in order to get 320lb mixture that is 10% protein?

Algebra 
Dr. Jane
x + y = 320
.16x + .08y = .10(320)
From there, just use the addition/elimination principle to solve for x and y.
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