document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=146084>Question 146084</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/032122826x/algebrahomeworkh>Finite Mathematics</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Please solve the system of equation for all variables using a matrix.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2x%2By=-4 ALIGN=MIDDLE  ALT=\"-2x%2By=-4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B3y=9 ALIGN=MIDDLE  ALT=\"x%2B3y=9\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "My solution\r<BR>\n" );
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document.write( "2 1=-4<BR>\n" );
document.write( "1 3=9\r<BR>\n" );
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document.write( "r2 reverse r1<BR>\n" );
document.write( "1 3=9<BR>\n" );
document.write( "2 1=-4\r<BR>\n" );
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document.write( "r2* -2<BR>\n" );
document.write( "1 3=9<BR>\n" );
document.write( "0 -1=-6\r<BR>\n" );
document.write( "\n" );
document.write( "r2* 2\r<BR>\n" );
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document.write( "1 3=9<BR>\n" );
document.write( "0 1=-12\r<BR>\n" );
document.write( "\n" );
document.write( "r2*-3+r1<BR>\n" );
document.write( "1 0=-6<BR>\n" );
document.write( "0 1=-12<BR>\n" );
document.write( "x= -6 and y= -12 <BR>\n" );
document.write( "Please help I'm trying to get these steps, but i think my mutiplcation is off somewhere. Thanks in advance.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #106624 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=106624\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Please solve the system of equation for all variables using a matrix.<BR>\n" );
document.write( "-2x+y = -4<BR>\n" );
document.write( "x +3y = 9<BR>\n" );
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document.write( "My solution <BR>\n" );
document.write( "2 1=-4<BR>\n" );
document.write( "1 3=9 <BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "r2 reverse r1<BR>\n" );
document.write( "1 3=9<BR>\n" );
document.write( "2 1=-4<BR>\n" );
document.write( "------------ <BR>\n" );
document.write( "r2* -2<BR>\n" );
document.write( "1 3=9<BR>\n" );
document.write( "0 -1=-6<BR>\n" );
document.write( "Comment: You cannot subtract 2 from the x-term, 2 from the y-,and 2 from <BR>\n" );
document.write( "the constant and still maintain the equation.<BR>\n" );
document.write( "What should you do?<BR>\n" );
document.write( "You should subtract 2*(1st row) from the 2nd row to get<BR>\n" );
document.write( "0 -5 = -22<BR>\n" );
document.write( "Then continue on.<BR>\n" );
document.write( "================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "-------------- <BR>\n" );
document.write( "r2* 2 <BR>\n" );
document.write( "1 3=9<BR>\n" );
document.write( "0 1=-12 <BR>\n" );
document.write( "r2*-3+r1<BR>\n" );
document.write( "1 0=-6<BR>\n" );
document.write( "0 1=-12<BR>\n" );
document.write( "x= -6 and y= -12 <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );