document.write( "Question 161488: 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 12% protein? \n" ); document.write( "
Algebra.Com's Answer #118950 by nerdybill(7384)\"\" \"About 
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Let x = amount of soybean meal
\n" ); document.write( "then because there is a total of 280 lbs:
\n" ); document.write( "280-x = amount of cornmeal
\n" ); document.write( ".
\n" ); document.write( ".14x + .07(280 - x) = .12(280)
\n" ); document.write( ".14x + 19.6 - .07x = 33.6
\n" ); document.write( "19.6 + .07x = 33.6
\n" ); document.write( ".07x = 14
\n" ); document.write( "x = 200 lbs (soybean meal)
\n" ); document.write( ".
\n" ); document.write( "cornmeal:
\n" ); document.write( "280-x = 280-200 = 80 lbs (cornmeal)
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