document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122833>Question 1122833</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Subscript notation is frequently used for working with larger systems of equations. Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form <BR>\n" );
document.write( "(x1, x2, x3, x4).<BR>\n" );
document.write( "x1 &#8722; 3x2 &#8722; 2x3 + x4	 = 	&#8722;4<BR>\n" );
document.write( "&#8722;2x1 + 7x2 + x3 &#8722; 2x4	 = 	&#8722;2<BR>\n" );
document.write( "3x1 &#8722; 7x2 &#8722; 3x3 + 3x4	 = 	&#8722;5<BR>\n" );
document.write( "5x1 + x2 + 4x3 &#8722; 2x4	 = 	20<BR>\n" );
document.write( "(x1, x2, x3, x4) = \r<BR>\n" );
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document.write( "  \r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #739008 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52788)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=739008\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "Go to the site  https://matrix.reshish.com/gauss-jordanElimination.php .\r<BR>\n" );
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document.write( "Find there free of charge online solver for matrix equations.\r<BR>\n" );
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document.write( "Input your extended matrix into the solver.\r<BR>\n" );
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document.write( "Then press the \"Solve\" button.\r<BR>\n" );
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document.write( "You will get the solution.\r<BR>\n" );
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