document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480424>Question 480424</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x^2+y=21<BR>\n" );
document.write( "-4x-y=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #329004 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=329004\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2+y=21..........1<BR>\n" );
document.write( "-4x-y=0...........2\r<BR>\n" );
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document.write( "From (1) y=21-x^2\r<BR>\n" );
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document.write( "substitute y in (2)\r<BR>\n" );
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document.write( "-4x-(21-x^2)=0\r<BR>\n" );
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document.write( "-4x-21+x^2=0\r<BR>\n" );
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document.write( "x^2-4x-21=0\r<BR>\n" );
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document.write( "x^2-7x+3x-21=0\r<BR>\n" );
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document.write( "x(x-7)+3(x-7)=0<BR>\n" );
document.write( "(x-7)(x+3)=0<BR>\n" );
document.write( "x=7 OR -3\r<BR>\n" );
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document.write( "when x = 7 y = -28  (7,-28)<BR>\n" );
document.write( "when x= -3 y= 12    (-3,12)\r<BR>\n" );
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document.write( "m.ananth@hotmail.ca </SPAN>\n" );
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