document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=86640>Question 86640</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A father is five years more than four times his son's age. In five years, he will be three times his son's age. How old is the son now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #62666 by </B><A HREF=/tutors/aboutme.mpl?userid=Nate><B>Nate(3500)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nate><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=62666\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A father is five years more than four times his son's age.<BR>\n" );
document.write( "f = 5 + 4s<BR>\n" );
document.write( "In five years, he will be three times his son's age. How old is the son now?<BR>\n" );
document.write( "f + 5 = 3(s + 5)<BR>\n" );
document.write( "Plug:<BR>\n" );
document.write( "5 + 4s + 5 = 3s + 15<BR>\n" );
document.write( "s = 5<BR>\n" );
document.write( "f = 5 + 20 = 25<BR>\n" );
document.write( "s + 5 is now ... so, the son is 10 years old. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );