soybean meal is 12 % protein and corn bean meal is 6%protein what it takes to make 240 IB mixture 7% protein?

Answer 1

x of 12 %
y of 6%

x+y = 240

.12 x + .06 y = .07(x+y)
or
.12 x + .06 (240-x) = .07 (240)