Posted by Anonymous on .
Soymeal is 12% protein; cornmael is 6% protein. How many pounds of each should be mixed together in order to get 240lb mixture that us 9% protein

Algebra 
Reiny,
amount of 12% needed  x lb
amount of 6% neede  240x lb
solve for x
.12x + .06(240x) = .09(240)
times 100
12x + 6(240x) = 9(240)
I will let you finish it