Question 161488
Let x = amount of soybean meal
then because there is a total of 280 lbs:
280-x = amount of cornmeal
.
.14x + .07(280 - x) = .12(280)
.14x + 19.6 - .07x = 33.6
19.6 + .07x = 33.6
.07x = 14
x = 200 lbs (soybean meal)
.
cornmeal:
280-x = 280-200 = 80 lbs (cornmeal)