Posted by Cami on .
a=14% protein in soybean b=7% protein in cornmeal
how many pounds mixed together to get 280lb mixture that is 9% protein
a= ____lbs soybean
b= ____lbs cornmeal
Thank you from the bottom of my heart,

Looks like SCIENCE to me! 
Writeacher,
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.

adult education 
bobpursley,
Looks like a classical algebra problem to me.
280lbs=S+C weight equation
280*.09=.14S+.07C protein equation
How to solve?
I would multiply the top equation by .07, then subtract one equation from the other.