document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=468514>Question 468514</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the tenth digit of a two digit no. is 5 more than the unit digit. what is the number if the sum of two digit is 9.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #321513 by </B><A HREF=/tutors/aboutme.mpl?userid=rfadrogane><B>rfadrogane(214)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rfadrogane><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=rfadrogane><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=321513\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the tenth digit of a two digit no. is 5 more than the unit digit. what is the number if the sum of two digit is 9. \r<BR>\n" );
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document.write( "Solution;\r<BR>\n" );
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document.write( "let: t - the ten's digit<BR>\n" );
document.write( "     u- the unit digit<BR>\n" );
document.write( "N - the number<BR>\n" );
document.write( "N = 10t + u\r<BR>\n" );
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document.write( "from first phrase:<BR>\n" );
document.write( " t = 5 + u <-----(1)\r<BR>\n" );
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document.write( "from second phrase:<BR>\n" );
document.write( " t + u = 9 <-----(2)\r<BR>\n" );
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document.write( "substitute (1) into (2),\r<BR>\n" );
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document.write( "(5 + u)+ u = 9<BR>\n" );
document.write( "2u = 9 - 5<BR>\n" );
document.write( "2u = 4, divide 2 on both side to obtain the value of u,<BR>\n" );
document.write( "u = 2\r<BR>\n" );
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document.write( "for t:\r<BR>\n" );
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document.write( "t = 9 - 2 = 7\r<BR>\n" );
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document.write( "Thus a number is\r<BR>\n" );
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document.write( "N = 10(7) + 2\r<BR>\n" );
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document.write( "N = 72 <----- answer\r<BR>\n" );
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