document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=991916>Question 991916</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this: \r<BR>\n" );
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document.write( "A man is four times as old as his son. In five years' time he will be three times as old as his son. 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 #611666 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=611666\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "S=son's age; F=father's age=4S <BR>\n" );
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document.write( "F+5=3(S+5) . Substitute for F.<BR>\n" );
document.write( "4S+5=3S+15<BR>\n" );
document.write( "S=10<BR>\n" );
document.write( "ANSWER 1: The son is 10 years old.<BR>\n" );
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document.write( "F=4S=4(10)=40<BR>\n" );
document.write( "ANSWER 2: The father is 40 years old.<BR>\n" );
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document.write( "CHECK:<BR>\n" );
document.write( "F+5=3(S+5)<BR>\n" );
document.write( "40+5=3(10+5)<BR>\n" );
document.write( "45=3(15)<BR>\n" );
document.write( "45=45\r<BR>\n" );
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