document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=769380>Question 769380</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a man is four time as old as his son,in four years time he will be three time as old as his son.what are their ages now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #468825 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=468825\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Man is 4 x as old as his son<BR>\n" );
document.write( "M = 4S<BR>\n" );
document.write( "In 4 years time he will be 3 x as old as his son.<BR>\n" );
document.write( "M + 4 = 3(S + 4)<BR>\n" );
document.write( "Replace M on right hand side<BR>\n" );
document.write( "with 4s<BR>\n" );
document.write( "4S + 4 = 3(S + 4)<BR>\n" );
document.write( "4S + 4 = 3S + 12<BR>\n" );
document.write( "4S - 3S = 12 - 4<BR>\n" );
document.write( "S = 8<BR>\n" );
document.write( "Ages now:<BR>\n" );
document.write( "Son 12 years old<BR>\n" );
document.write( "Man 36 years old<BR>\n" );
document.write( "Hope this helps.<BR>\n" );
document.write( ":-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );