document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=318004>Question 318004</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am stuck on this stinking problem, I am unsure how they get 28 for the answer after adding the sum and multiplying by 10% Can anyone please help me out...<BR>\n" );
document.write( "The original question is this\r<BR>\n" );
document.write( "\n" );
document.write( "soybean meal is 14% protien, cornmeal is 7% protien, how many pounds of each should be mixed together in order to get 280 lb mixture that is 10 % protien?<BR>\n" );
document.write( "Let x= cornmeal and y= soy bean meal....\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "0.07x+0.14y=28 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #227674 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=227674\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = the number of lbs of 14%-protein soybean meal, then (280-x)  the number of lbs of 7%-protein cornmeal.  When added together, these are to produce 280 lbs of 10-protein mixture.<BR>\n" );
document.write( "0.14x+0.07(280-x) = 0.1(280)<BR>\n" );
document.write( "0.14x+19.6-0.07x = 28<BR>\n" );
document.write( "0.07x+19.6 = 28<BR>\n" );
document.write( "0.07x = 8.4<BR>\n" );
document.write( "x = 120 lbs of soybean meal.<BR>\n" );
document.write( "280-x = 280-120 = 160 lbs of cornmeal.<BR>\n" );
document.write( "Check:<BR>\n" );
document.write( "0.14(120)+0.07(160) =16.8+11.2 = 28 = 0.1(280)  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );