Let be the mass of soybean in the mix andOriginally Posted bydvnswl

be the mass of corn meal in the mix.

Then as these add to pounds:

.

The mass of protien in the mix is:

,

which is 12% of the total mass, so:

,

which may be rearranged to:

.

So now you have a pair of simultaneous linear

equations in x and y to solve.

RonL