Question

Soybean is 14% protein; cornmeal s 7% protein, How many pounds of each should be mixed together to get 280-lb mixture that is 12% protein?

Answer 1

Let x = lbs of Soybean
Let y = lbs of cornmeal
x+y=280 lbs
.14x + .07y=.12(280)=33.6
x=280-y
.14(280-y)+.07y=33.6
39.2-.14y+.07y=33.6
-.07y=-5.6
y=80 lbs
x=200 lbs

Answer 2

80 pounds cornmeal
200 pounds of soybean