document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=20936>Question 20936</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i do not get how to do a three  system using the linear combinations method.<BR>\n" );
document.write( "could you explain and show me how to do it?<BR>\n" );
document.write( "2a+b-5c=-21<BR>\n" );
document.write( "a+2b-2c=-15<BR>\n" );
document.write( "a-4b+c=18\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #10733 by </B><A HREF=/tutors/aboutme.mpl?userid=khwang><B>khwang(438)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=khwang><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=10733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  This belongs to linear system, not linear algebra. \r<BR>\n" );
document.write( "\n" );
document.write( " Kenny<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );