document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=71411>Question 71411</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x+y=12<BR>\n" );
document.write( "x-y=4<BR>\n" );
document.write( "slove using elimination </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #51084 by </B><A HREF=/tutors/aboutme.mpl?userid=303795><B>303795(602)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=303795><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=51084\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you add the first equation to the second one you will eliminate the y.<BR>\n" );
document.write( "x + y + x - y = 12 + 4<BR>\n" );
document.write( "2x = 16<BR>\n" );
document.write( "so x = 8<BR>\n" );
document.write( "Substitute x = 8 back into your original first equation<BR>\n" );
document.write( "x + y = 12<BR>\n" );
document.write( "so 8 + y = 12<BR>\n" );
document.write( "y = 4<BR>\n" );
document.write( "Check that x = 8, y = 4 works in the second equation<BR>\n" );
document.write( "8 - 4 = 4<BR>\n" );
document.write( "Correct </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );