Question

soybean meal is 14% protien cornmeal is 7% protein .how many pounds of each should be mixed together in order to get 280 lbs mixture that is 11% protein?

Answer 1

.14s+.07c=.11

Answer 2

lets write a little equation here:

we will call the soybean meal: S , which of course means that 280-S=Amount of corn meal

Now we have :
14S+.07(280-S)=.11*280
.14S+19.6-.07S=30.8
.07S=30.8-19.6
.07S11.2
S=11.2/.07
Which gives us: S=160
Then : 280-160=120 for the cornmeal

Answer 3

my second equations would have been s+c=280 but i believe lagrange beat me to it lol