document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=291249>Question 291249</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A man is nine times as old as his son. In nine years, he will only be three times as old as his son. How old are each now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #210651 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=210651\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let M be the man's age, S be the son's.<BR>\n" );
document.write( "Right now,<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M=9S ALIGN=MIDDLE  ALT=\"M=9S\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In 9 years, the man will be M+9 and his son will be S+9.<BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M%2B9=3%28S%2B9%29 ALIGN=MIDDLE  ALT=\"M%2B9=3%28S%2B9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substitute for M in eq. 2 using eq. 1 and solve for S.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M%2B9=3%28S%2B9%29 ALIGN=MIDDLE  ALT=\"M%2B9=3%28S%2B9%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9S%2B9=3S%2B27 ALIGN=MIDDLE  ALT=\"9S%2B9=3S%2B27\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=6S=18 ALIGN=MIDDLE  ALT=\"6S=18\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S=3 ALIGN=MIDDLE  ALT=\"S=3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now go back to eq. 1,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M=9S ALIGN=MIDDLE  ALT=\"M=9S\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M=9%283%29 ALIGN=MIDDLE  ALT=\"M=9%283%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=M=27 ALIGN=MIDDLE  ALT=\"M=27\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Today, the man is 27 years old and his son is 3 years old.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );