document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=953173>Question 953173</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of the digits of a certain two-digit number is 7. Reversing it's digits increases the number by 9. What is the number? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #701918 by </B><A HREF=/tutors/aboutme.mpl?userid=adamhen894><B>adamhen894(15)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=adamhen894><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=701918\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let<BR>\n" );
document.write( "x = tens digit <BR>\n" );
document.write( "y = ones digit\r<BR>\n" );
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document.write( "sum of digits of two-digits number is 7<BR>\n" );
document.write( "x+y=7\r<BR>\n" );
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document.write( "reversing its digits increases the number by 9<BR>\n" );
document.write( "10y+x=(10x+y)+9\r<BR>\n" );
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document.write( "now you got a system of equation, you can solve for two variables.\r<BR>\n" );
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document.write( "the answer x=3 y=4\r<BR>\n" );
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document.write( "you can find two number and test it out, it will be more easy to understand. (ex. x= 3 y=4)\r<BR>\n" );
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document.write( "i would lvoe to hear alternative ways to solve it, gmail me if you have one<BR>\n" );
document.write( "adamchen894@gmail.com </SPAN>\n" );
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