document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1>Question 1</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A father's age is thirteen times that of his son. In 10 years, the son's age will be one-third of his father's. How old are the father and son? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #82 by </B><A HREF=/tutors/aboutme.mpl?userid=ichudov><B>ichudov(507)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ichudov><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=ichudov><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=82\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It is easy, just write the problem in slightly more mathematical manner:\r<BR>\n" );
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document.write( "father's age = 13 * son's age<BR>\n" );
document.write( "son's age + 10 = (father's age + 10 )/3\r<BR>\n" );
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document.write( "Because we know that father's age is 13* son's age, we have\r<BR>\n" );
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document.write( "son's age + 10 = (13*son's age + 10)/3\r<BR>\n" );
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document.write( "or\r<BR>\n" );
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document.write( "3*(son's age + 10) =  (13*son's age + 10)\r<BR>\n" );
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document.write( "or \r<BR>\n" );
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document.write( "3*son's age + 30 = 13*son's age + 10<BR>\n" );
document.write( "20 = 10 * son's age\r<BR>\n" );
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document.write( "<B>ANSWER:</B>\r<BR>\n" );
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document.write( "son's age = 2<BR>\n" );
document.write( "father's age = 13*2 = 26. </SPAN>\n" );
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