document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=770534>Question 770534</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am not understanding how to solve for x in a matrix. The problem I am looking at is: SOLVE FOR X, GIVEN THAT<BR>\n" );
document.write( "|-5 0 -1|<BR>\n" );
document.write( "|2  1  0|=4<BR>\n" );
document.write( "|x  3  0|\r<BR>\n" );
document.write( "\n" );
document.write( "I don't even really know where to start with this and my book isn't helping! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #469584 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=469584\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I am not understanding how to solve for x in a matrix. The problem I am looking at is: SOLVE FOR X, GIVEN THAT<BR>\n" );
document.write( "|-5 0 -1|<BR>\n" );
document.write( "|2  1  0|=4<BR>\n" );
document.write( "|x  3  0|<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Assuming 4 is the determinant (nothing else makes sense),<BR>\n" );
document.write( "Expand by minors.<BR>\n" );
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document.write( "x*(0+1) - 3*(0+2) + 0 = 4<BR>\n" );
document.write( "x - 6 = 4<BR>\n" );
document.write( "x = 10\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );