document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1005144>Question 1005144</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A father is now 28 years older than his son.  Ten years ago the father was 15 times as old as his son.  How old is the father now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #621447 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=621447\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Call the father and son's age NOW, f and s.  Then we have<BR>\n" );
document.write( "f = s + 28  and<BR>\n" );
document.write( "f - 10 = 15(s - 10)<BR>\n" );
document.write( "Substitute the first into the second equation and get<BR>\n" );
document.write( "s + 28 - 10 = 15(s - 10)<BR>\n" );
document.write( "s + 18 = 15s - 150<BR>\n" );
document.write( "168 = 14s<BR>\n" );
document.write( "s = 12<BR>\n" );
document.write( "f is then 40 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );