document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=20162>Question 20162</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have to solve a 4X4 matrix<BR>\n" );
document.write( "w  x  y  z<BR>\n" );
document.write( "2 -2 -2  2 10<BR>\n" );
document.write( "1  1  1  1 -5<BR>\n" );
document.write( "3  1 -1  4 -2<BR>\n" );
document.write( "1  3 -2  2 -6\r<BR>\n" );
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document.write( "Now I know I can flip row 2 and row 1<BR>\n" );
document.write( "1  1  1  1  -5<BR>\n" );
document.write( "2 -2 -2  2  10<BR>\n" );
document.write( "3  1 -1  4  -2<BR>\n" );
document.write( "1  3 -2  2  -6\r<BR>\n" );
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document.write( "Now I can slove the second row by mutiplying row1 one by -2 and adding row2 etc.<BR>\n" );
document.write( "1  1  1  1  -5<BR>\n" );
document.write( "0 -4 -4  0  20<BR>\n" );
document.write( "0 -2 -7  1  13<BR>\n" );
document.write( "0  2 -3  1  -1\r<BR>\n" );
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document.write( "Now I am stuck where do I go from here???? <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #9748 by </B><A HREF=/tutors/aboutme.mpl?userid=vidyamanohar><B>vidyamanohar(13)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vidyamanohar><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=9748\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I will continue from where you left the problem....\r<BR>\n" );
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document.write( "1  1  1 1 -5<BR>\n" );
document.write( "0 -4 -4 0  20<BR>\n" );
document.write( "0 -2 -7 1  13<BR>\n" );
document.write( "0  2 -3 1 -1 \r<BR>\n" );
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document.write( "flip row 3 and row 2<BR>\n" );
document.write( "1  1  1  1 -5<BR>\n" );
document.write( "0 -2 -7  1  13<BR>\n" );
document.write( "0 -4 -4  0  20<BR>\n" );
document.write( "0  2 -3  1 -1 <BR>\n" );
document.write( "no multiply row 2 with 2 and subtract it from row 3<BR>\n" );
document.write( "and simultaneously add row 2 to row 4\r<BR>\n" );
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document.write( "1  1  1   1  -5<BR>\n" );
document.write( "0 -2 -7   1  13<BR>\n" );
document.write( "0  0  10 -2 -6<BR>\n" );
document.write( "0  0 -10  2  12\r<BR>\n" );
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document.write( "now add row 3 to row 4<BR>\n" );
document.write( "1  1  1   1  -5<BR>\n" );
document.write( "0 -2 -7   1  13<BR>\n" );
document.write( "0  0  10 -2 -6<BR>\n" );
document.write( "0  0  0   0  6\r<BR>\n" );
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document.write( "since the first 4 elements is fourth row are zeros and the last element is non zero, the system doesnot possess solution.\r<BR>\n" );
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document.write( "the system is inconsistent </SPAN>\n" );
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