document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=663414>Question 663414</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a father is three times as old as his son. after twelve years, his age will be twice as that of his son then. find their present ages. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #412757 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=412757\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a father is three times as old as his son. after twelve years, his age will be twice as that of his son then. find their present ages.<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "f = 3s<BR>\n" );
document.write( "f+12 = 2(s+12)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"f\" and solve for \"s\":<BR>\n" );
document.write( "3s+12 = 2s+24<BR>\n" );
document.write( "s = 12 yrs (the son's age)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Solve for \"f\":<BR>\n" );
document.write( "f = 3s<BR>\n" );
document.write( "f = 3*12 = 36 yrs (the father's age)<BR>\n" );
document.write( "==============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );