Question 988492
Soybean meal in 16% protein and corn meal is 9% protein. How many pounds of each should be mixed to get a 350 lb mixture that is 12% protein? 
<pre>Let amount of 16% protein to mix, be S
Then amount of 9% protein to mix = 350 - S
We then get: .16S + .09(350 - S) = .12(350)
.16S + 31.5 - .09S = 42
.16S - .09S = 42 - 31.5
.07S = 10.5
S, or amount of 16% protein to mix = {{{10.5/.07}}}, or {{{highlight_green(150)}}} lbs
Amount of 9% protein to mix = 250 - 150, or {{{highlight_green(200)}}} lbs