document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=32032>Question 32032</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve:<BR>\n" );
document.write( "3x - y = 4<BR>\n" );
document.write( "xy = 7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #18566 by </B><A HREF=/tutors/aboutme.mpl?userid=mukhopadhyay><B>mukhopadhyay(490)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mukhopadhyay><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=18566\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> xy = 7<BR>\n" );
document.write( "=>x=7/y<BR>\n" );
document.write( "3x - y = 4<BR>\n" );
document.write( "=>3(7/y)-y=4<BR>\n" );
document.write( "=>21/y-y=4<BR>\n" );
document.write( "=>21-y^2=4y<BR>\n" );
document.write( "=>y^2+4y-21=0<BR>\n" );
document.write( "=>y^2+7y-3y-21=0<BR>\n" );
document.write( "=>y(y+7)-3(y+7)=0<BR>\n" );
document.write( "=>(y+7)(y-3)=0<BR>\n" );
document.write( "=>y=-7 or y=3<BR>\n" );
document.write( "When y=-7, x=7/y=7/(-7)=-1<BR>\n" );
document.write( "When y=3, x=7/3<BR>\n" );
document.write( "Answer {(-1,-7),(7/3,3)}<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );