document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1046928>Question 1046928</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of two digits of a certain two-digit number is 15. If the digits are reversed, the number formed is nine less than the original number. What is the original number? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #662377 by </B><A HREF=/tutors/aboutme.mpl?userid=advanced_Learner><B>advanced_Learner(501)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=advanced_Learner><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=advanced_Learner><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=662377\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> by guess work<BR>\n" );
document.write( "87<BR>\n" );
document.write( "because<BR>\n" );
document.write( "87=78+9<BR>\n" );
document.write( "and 8+7=15<BR>\n" );
document.write( "by equations<BR>\n" );
document.write( "you have<BR>\n" );
document.write( "10y+x original number\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "x+y=15<BR>\n" );
document.write( "10x+y=-9+10y+x<BR>\n" );
document.write( "9x-9y=-9\r<BR>\n" );
document.write( "\n" );
document.write( "x-y=-1<BR>\n" );
document.write( "x+y=15<BR>\n" );
document.write( "2x=14<BR>\n" );
document.write( "x=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7 ALIGN=MIDDLE  ALT=\"7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and y=15-7,y=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8 ALIGN=MIDDLE  ALT=\"8\"   DISABLED_style= \"max-width:90%; height:auto;\" >}\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );