document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=362877>Question 362877</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve the matrix equation AX=B for the 2x2 matrix X:<BR>\n" );
document.write( "A<BR>\n" );
document.write( "2 -7<BR>\n" );
document.write( "-1 4  ] x=<BR>\n" );
document.write( "     <BR>\n" );
document.write( "B<BR>\n" );
document.write( "-21 3<BR>\n" );
document.write( "12  -2\r<BR>\n" );
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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 #258806 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=258806\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> [A]=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28matrix%282%2C2%2C2%2C-7%2C-1%2C4%29%29 ALIGN=MIDDLE  ALT=\"%28matrix%282%2C2%2C2%2C-7%2C-1%2C4%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "[B]=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28matrix%282%2C2%2C-21%2C3%2C12%2C-2%29%29 ALIGN=MIDDLE  ALT=\"%28matrix%282%2C2%2C-21%2C3%2C12%2C-2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "[A][X]=[B]<BR>\n" );
document.write( "[X]=[A]inv[B]<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "det[A]=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "[A]inv=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28matrix%282%2C2%2C4%2C7%2C1%2C2%29%29 ALIGN=MIDDLE  ALT=\"%28matrix%282%2C2%2C4%2C7%2C1%2C2%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "[X]=[A]inv[B]=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28matrix%282%2C2%2C0%2C-2%2C3%2C-1%29%29 ALIGN=MIDDLE  ALT=\"%28matrix%282%2C2%2C0%2C-2%2C3%2C-1%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );