SOLUTION: Soybean meal is 18% protein and cornmeal is 9% protein. How many pounds of each mixture should be mixed together in order to get 360lb mixture that is 11% protein?

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Question 257163: Soybean meal is 18% protein and cornmeal is 9% protein. How many pounds of each mixture should be mixed together in order to get 360lb mixture that is 11% protein?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
S-lbs of soybean
C-lbs of cornmeal
1.18S%2B9C=11%28360%29
2.S%2BC=360
Use eq. 2 to solve for S in terms of C. Substitute into eq. 1.
S%2BC=360
S=360-C
1.18S%2B9C=3960
18%28360-C%29%2B9C=3960
6480-18C%2B9C=3960
-9C=-2520
C=280
S=360-C
S=360-280=80
80 lbs of soybean, 280 lbs of cornmeal.