SOLUTION: soybean meal is 12% protein; cornmeal is 6% protein. how many pounds of each should be missed together in order to get 240lb mixture that is 7% protein? how many pound of soybean

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Question 264904: soybean meal is 12% protein; cornmeal is 6% protein. how many pounds of each should be missed together in order to get 240lb mixture that is 7% protein? how many pound of soybean and how many pounds of cornmeal?
do we take 12% and convert to .12 and 6% to .06 and thats as far as i can get.
Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website!
First express what you want to end up with in words
(pounds of protein in final mixture)/(total pounds of mixture) = 7%
Let = pounds of soybean meal needed
Let = pounds of cornmeal needed
given:
= pounds of protein from soybean meal
= pounds of protein from cornmeal
(1) pounds
------------------------

(2)
Multiply both sides of (1) by
and subtract from (2)
(2)
(1)

And, from (1)

40 pounds of soybean meal and 200 pounds of cornmeal are needed
check answer:

OK