document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1036845>Question 1036845</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how many 2 digit numbers are possible such that the sum of their digits is equal to twice the difference between digits? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #651550 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=651550\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sum can't be odd, because then it wouldn't be divisible by 2.<BR>\n" );
document.write( "Therefore, only even digits or odd digits are allowed.<BR>\n" );
document.write( "11,13,15,17,19--13 works and 31<BR>\n" );
document.write( "20,22,24,26,28----26 works and 62<BR>\n" );
document.write( "31,33,35,37,39----39 works and 93<BR>\n" );
document.write( "40,42,44,46,48--no<BR>\n" );
document.write( "51,53,55,57,59--no<BR>\n" );
document.write( "yx<BR>\n" );
document.write( "y+x=2(y-x)<BR>\n" );
document.write( "y+x=2y-2x<BR>\n" );
document.write( "3x=y<BR>\n" );
document.write( "========<BR>\n" );
document.write( "y+x=2(x-y)<BR>\n" );
document.write( "y+x=2x-2y<BR>\n" );
document.write( "x=3y<BR>\n" );
document.write( "6 numbers are possible<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );