document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=387061>Question 387061</A>: <I><SPAN STYLE=\"word-break: break-all;\"> one type of cattle feed is 4% protein while a second type is 13% protein. how many pounds of each type must be mixed to make 45 pounds of mixture that is 10% protein? </SPAN>\n" );
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document.write( "Let x = amount (lbs) of 4% protein<BR>\n" );
document.write( "then<BR>\n" );
document.write( "45-x = amount (lbs) of 13% proteen<BR>\n" );
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document.write( ".04x + .13(45-x) = .10(45)<BR>\n" );
document.write( ".04x + 5.85-.13x) = 4.5<BR>\n" );
document.write( "5.85-.09x = 4.5<BR>\n" );
document.write( "5.85 = .09x+4.5<BR>\n" );
document.write( "1.35 = .09x<BR>\n" );
document.write( "15 pounds = x (amount of 4% protein feed)<BR>\n" );
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document.write( "13% protein feed:<BR>\n" );
document.write( "45-x = 45-15 = 30 pounds\r<BR>\n" );
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document.write( " </SPAN>\n" );
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