document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=990233>Question 990233</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3x-4y-z=25<BR>\n" );
document.write( "2x+y+4z=29 <BR>\n" );
document.write( "X=-2y <BR>\n" );
document.write( " X=? Y=? Z=?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #610310 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=610310\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3x-4y-z=25<BR>\n" );
document.write( "2x+y+4z=29 <BR>\n" );
document.write( "X=-2y<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Sub for x in eqn 1 and eqn 2:<BR>\n" );
document.write( "3x-4y-z=25<BR>\n" );
document.write( "2x+y+4z=29<BR>\n" );
document.write( "---<BR>\n" );
document.write( "3(-2y) - 4y - z = 25<BR>\n" );
document.write( "-10y - z = 25  Eqn A\r<BR>\n" );
document.write( "\n" );
document.write( "--<BR>\n" );
document.write( "2(-2y) + y + 4z = 29<BR>\n" );
document.write( "-3y + 4z = 29<BR>\n" );
document.write( "-10y - z = 25  Eqn A<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "-3y + 4z = 29<BR>\n" );
document.write( "-40y -4z = 100  Eqn A times 4<BR>\n" );
document.write( "-------------------------------------- Add<BR>\n" );
document.write( "-43y = 129<BR>\n" );
document.write( "y = -3 *******************************<BR>\n" );
document.write( "Sub for y and find x & z<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );