document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=53279>Question 53279</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please show me how to solve the system by addition?<BR>\n" );
document.write( "x+y=9<BR>\n" );
document.write( "x-y=9\r<BR>\n" );
document.write( "\n" );
document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #35559 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=35559\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1st: x+y=9<BR>\n" );
document.write( "2nd: x-y=9 <BR>\n" );
document.write( "Add the two equations to get:<BR>\n" );
document.write( "3rd: 2x=18<BR>\n" );
document.write( "x=9<BR>\n" );
document.write( "Substutute that into 1st to solve for y, as follows:<BR>\n" );
document.write( "9+y=9<BR>\n" );
document.write( "y=0<BR>\n" );
document.write( "Check the answer in 2nd.<BR>\n" );
document.write( "x-y=9<BR>\n" );
document.write( "9-0=9<BR>\n" );
document.write( "9=9<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );