document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=910663>Question 910663</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help solving the system by using the Gauss-Jordan elimination method. w/out a calculator.\r<BR>\n" );
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document.write( "2x-1y+2z=9<BR>\n" );
document.write( "1x+3+0=5<BR>\n" );
document.write( "3x+0+1z=9\r<BR>\n" );
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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 #552598 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=552598\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The starting matrix:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28matrix%283%2C4%2C%0D%0A2%2C-1%2C2%2C9%2C%0D%0A1%2C3%2C0%2C5%2C%0D%0A3%2C0%2C1%2C9%29%29 ALIGN=MIDDLE  ALT=\"%28matrix%283%2C4%2C%0D%0A2%2C-1%2C2%2C9%2C%0D%0A1%2C3%2C0%2C5%2C%0D%0A3%2C0%2C1%2C9%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "I went through these steps, which I am indicating in abbreviated form:\r<BR>\n" );
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document.write( "Switch R1 and R2;<BR>\n" );
document.write( "R2-2R1, R3-3R1;<BR>\n" );
document.write( "-1*R2 and -1*R3;<BR>\n" );
document.write( "(1/7)R2 and (1/9)R3;<BR>\n" );
document.write( "R3-R1;<BR>\n" );
document.write( "computation for R3;<BR>\n" );
document.write( "21*R3<BR>\n" );
document.write( "(3/11)R3;<BR>\n" );
document.write( "R2=R2+(2/7)R3;<BR>\n" );
document.write( "R1=R1-3R2.\r<BR>\n" );
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document.write( "Final matrix became\r<BR>\n" );
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