SOLUTION: Soybean meal is 16% protein and cornmeal is 8% protien, how many pounds of each should be mixed together in order to get 320lb mixture that is 13% protein?

Question 178279: Soybean meal is 16% protein and cornmeal is 8% protien, how many pounds of each should be mixed together in order to get 320lb mixture that is 13% protein?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = pounds of soybean meal needed
Let = pounds of cornmeal needed
In words:
(pounds of protein in soybean meal + pounds of protein in cornmeal) /
(total pounds of soybean and cornmeal) = % protein
given:
(1)
(2)

(3)
Multiply both sides of (1) by and subtract from (3)
(3)
(1)

And, since
(1)

200 pounds of soybean meal are needed and
120 pounds of cornmeal are needed
check:
(2)

OK
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