document.write( "Question 874912: Soybean meal is 18% protein; cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360-lb mixture that is 15% protein?
\n" ); document.write( "How many pounds of cornmeal should be in the mixture?
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Algebra.Com's Answer #527845 by mananth(16946)\"\" \"About 
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percent ---------------- quantity
\n" ); document.write( "soybean 18.00% ---------------- x pounds
\n" ); document.write( "Cereal 9.00% ------ 360 - x pounds
\n" ); document.write( "Mixture 15.00% ---------------- 360
\n" ); document.write( "Total 360 pounds
\n" ); document.write( "18.00% x + 9.00% ( 360 - x ) = 15.00% * 360
\n" ); document.write( "18 x + 9 ( 360 - x ) = 5400
\n" ); document.write( "18 x + 3240 - 9 x = 5400
\n" ); document.write( "18 x - 9 x = 5400 - -3240
\n" ); document.write( "9 x = 2160
\n" ); document.write( "/ 9
\n" ); document.write( " x = 240 pounds 18.00% soybean
\n" ); document.write( " 120 pounds 9.00% Cereal
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\n" ); document.write( "m.ananth@hotmail.ca
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