document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=306818>Question 306818</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system of equations to the right using matrices. Use Gaussian elimination with back substitution or Gauss Jordan elimination.\r<BR>\n" );
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document.write( "x + y + z= 9<BR>\n" );
document.write( "x - y - z= -7<BR>\n" );
document.write( "x -y + z = 1\r<BR>\n" );
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document.write( "The solution set is [_, _, _] </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535539 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=535539\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "add  down (-1/1) *row 1 to row 2<BR>\n" );
document.write( "1,1,1,9<BR>\n" );
document.write( "0,-2,-2,-16<BR>\n" );
document.write( "1,-1,1,1\r<BR>\n" );
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document.write( "add  down (-1/1) *row 1 to row 3<BR>\n" );
document.write( "1,1,1,9<BR>\n" );
document.write( "0,-2,-2,-16<BR>\n" );
document.write( "0,-2,0,-8\r<BR>\n" );
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document.write( "divide row 2 by -2/1<BR>\n" );
document.write( "1,1,1,9<BR>\n" );
document.write( "0,1,1,8<BR>\n" );
document.write( "0,-2,0,-8\r<BR>\n" );
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document.write( "add  down (2/1) *row 2 to row 3<BR>\n" );
document.write( "1,1,1,9<BR>\n" );
document.write( "0,1,1,8<BR>\n" );
document.write( "0,0,2,8\r<BR>\n" );
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document.write( "divide row 3 by 2/1<BR>\n" );
document.write( "1,1,1,9<BR>\n" );
document.write( "0,1,1,8<BR>\n" );
document.write( "0,0,1,4\r<BR>\n" );
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document.write( "add up  (-1/1) *row 3 to row 2<BR>\n" );
document.write( "1,1,1,9<BR>\n" );
document.write( "0,1,0,4<BR>\n" );
document.write( "0,0,1,4\r<BR>\n" );
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document.write( "add up  (-1/1) *row 3 to row 1<BR>\n" );
document.write( "1,1,0,5<BR>\n" );
document.write( "0,1,0,4<BR>\n" );
document.write( "0,0,1,4\r<BR>\n" );
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document.write( "add up  (-1/1) *row 2 to row 1<BR>\n" );
document.write( "1,0,0,1<BR>\n" );
document.write( "0,1,0,4<BR>\n" );
document.write( "0,0,1,4\r<BR>\n" );
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document.write( "final<BR>\n" );
document.write( "1,0,0,1<BR>\n" );
document.write( "0,1,0,4<BR>\n" );
document.write( "0,0,1,4\r<BR>\n" );
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document.write( "x=1 y=4 z=4<BR>\n" );
document.write( "(1,4,4)<BR>\n" );
document.write( " </SPAN>\n" );
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