document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=987172>Question 987172</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A woman is 3 times as old as her son.8 years ago the product of their age was 112.find their present age  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #607950 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=607950\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "A woman is 3 times as old as her son.<BR>\n" );
document.write( "W = 3S<BR>\n" );
document.write( "8 years ago the product of their age was 112.<BR>\n" );
document.write( "(W - 8)(S - 8) = 112<BR>\n" );
document.write( "Replace W with 3s from top equation<BR>\n" );
document.write( "(3S - 8)(S - 8) = 112<BR>\n" );
document.write( "Multiply out<BR>\n" );
document.write( "3S^2 - 32S + 64 = 0<BR>\n" );
document.write( "Factorise<BR>\n" );
document.write( "(3S + 4)(S - 12) = 0<BR>\n" );
document.write( "3S + 4 = 0<BR>\n" );
document.write( "3S = -4<BR>\n" );
document.write( "S = -4/3 (No answer as -ve)<BR>\n" );
document.write( "S - 12 = 0<BR>\n" );
document.write( "S = 12<BR>\n" );
document.write( "Son is 12 years old<BR>\n" );
document.write( "Woman is 36 years old<BR>\n" );
document.write( "Hope this helps :-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );