document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=364998>Question 364998</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of the digits of a positive 2-digit number is 13 If twice the first digit is 1 less than the second digit, what is the two digit number? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #260229 by </B><A HREF=/tutors/aboutme.mpl?userid=amoresroy><B>amoresroy(361)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=amoresroy><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=amoresroy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=260229\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sum of the digits of a positive 2-digit number is 13 If twice the first digit is 1 less than the second digit, what is the two digit number?\r<BR>\n" );
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document.write( "Let x = the unit's digit as the first digit<BR>\n" );
document.write( "    y = the ten's digit as the second digit\r<BR>\n" );
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document.write( "1st equation<BR>\n" );
document.write( "x+y = 13\r<BR>\n" );
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document.write( "2nd equation<BR>\n" );
document.write( "2x = y-1<BR>\n" );
document.write( "y = 2x+1\r<BR>\n" );
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document.write( "Substituting y=2x+1 in equation 1 gives us<BR>\n" );
document.write( "x+(2x+1)=13<BR>\n" );
document.write( "     3x =13-1<BR>\n" );
document.write( "      x =4\r<BR>\n" );
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document.write( "Then y = 13-4=9\r<BR>\n" );
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document.write( "The 2-digit number is 94<BR>\n" );
document.write( "      </SPAN>\n" );
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