How many pounds of cornmeal? How many pounds of soybean?

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Soybean meal is 14% protein; cornmeal is 7% protein.  How many pounds of each should be mixed together in order to get 289-in mixture that is 10% protein?

Jun 7th, 2015

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Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280-lb mixture that is 10% protein?
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Soybean meal is 14% protein x lb
cornmeal is 7% protein. 280-x lb
10% protein 280-lb mixture 
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14x+7(280-x)=10*280


14x+1960-7x=2800
7x+1960=2800
-1960
7x=840
/7
x=120 lb. ----------soyabean
160 lb -------------cornmeal

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Jun 7th, 2015

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Jun 7th, 2015
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