document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=112259>Question 112259</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of two numbers is 31.  Their difference is 9.  What are the two numbers? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #81895 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=81895\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x+y=31 or x=31-y<BR>\n" );
document.write( "x-y=9<BR>\n" );
document.write( "now replace x by (31-y) & solve for y<BR>\n" );
document.write( "31-y-y=9<BR>\n" );
document.write( "31-2y=9<BR>\n" );
document.write( "-2y=9-31<BR>\n" );
document.write( "-2y=-22<BR>\n" );
document.write( "y=-22/-2<BR>\n" );
document.write( "y=11 answer.<BR>\n" );
document.write( "x+11=31<BR>\n" );
document.write( "x=31-11<BR>\n" );
document.write( "x=20 answer.<BR>\n" );
document.write( "proof.<BR>\n" );
document.write( "20+11=31<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );