document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=87897>Question 87897</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3x -y =-7<BR>\n" );
document.write( "x + y = -9 <BR>\n" );
document.write( "ok I think I need to rewrite the equation with y= 3(x-x)-7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #63765 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=63765\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Just add the two equations together:\r<BR>\n" );
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document.write( "3x -y =-7<BR>\n" );
document.write( "x + y = -9 <BR>\n" );
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document.write( "4x = -16\r<BR>\n" );
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document.write( "x=-4\r<BR>\n" );
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document.write( "Substitute the x=-4 back into either equation.  The second equation will be easier:\r<BR>\n" );
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document.write( "x+y=-9<BR>\n" );
document.write( "-4 +y = -9\r<BR>\n" );
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document.write( "Add +4 to each side:<BR>\n" );
document.write( "-4+y+4=-9+4<BR>\n" );
document.write( "y=-5\r<BR>\n" );
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document.write( "The solution is the point x=-4, y=-5 or (-4,-5).\r<BR>\n" );
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document.write( "R^2  Retired from SCC </SPAN>\n" );
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