document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=429763>Question 429763</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of the digits of certain two digit number is 7. Reversing its digits increases the number by 9. What is the number? And what is its linear equation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #298471 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=298471\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let t=the tens digit and u=the units digit.<BR>\n" );
document.write( "10t+u is the number.<BR>\n" );
document.write( "10t+u=10u+t-9<BR>\n" );
document.write( "9t-9u=-9<BR>\n" );
document.write( ".<BR>\n" );
document.write( "t-u=-1 divide each side by 9<BR>\n" );
document.write( "t+u=7<BR>\n" );
document.write( "-------add<BR>\n" );
document.write( "2t=6<BR>\n" );
document.write( ".<BR>\n" );
document.write( "t=3<BR>\n" );
document.write( "u=4<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );