document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=168727>Question 168727</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve the systme by using an augmented matrix\r<BR>\n" );
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document.write( " 4x+y-z=7<BR>\n" );
document.write( " -2x+2y+5z=3<BR>\n" );
document.write( " 7x-3y-9z=-4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #124397 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=124397\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4x+y-z=7<BR>\n" );
document.write( "-2x+2y+5z=3<BR>\n" );
document.write( "7x-3y-9z=-4<BR>\n" );
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document.write( "x = -1<BR>\n" );
document.write( "y = 8<BR>\n" );
document.write( "z = -3<BR>\n" );
document.write( "I have an Excel sheet that does these. If you have Excel and want a copy, email me.\r<BR>\n" );
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document.write( "Doing them by hand is tedious and error prone.  It's important to know how to do them, but once you know, it's better to avoid it.<BR>\n" );
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