Question 495346
Let x=amount of soybean meal needed
Then 320-x=amount of cornmeal needed

Now we know that the amount of pure protein that exists before the mixture takes place has to equal the amount of pure protein that exists after the mixture takes place, sooooo:
0.16x+0.08(320-x)=0.11*320
0.16x+25.6-0.08x=35.2  subtract 25.6 from each side
0.08x=9.6
x=120 pounds----amount of soybean meal needed
320-120=200 pounds--amount of cornmeal needed

CK
0.16*120+0.08*200=35.2
19.2+16=35.2
35.2=35.2

Hope this helps----ptaylor