document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=406012>Question 406012</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A father is now twice as old as his daughter. 10 years ago he was 3 times as old as her. How old are they both now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #286620 by </B><A HREF=/tutors/aboutme.mpl?userid=J2R2R><B>J2R2R(94)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=J2R2R><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=J2R2R><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=286620\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f is age of father; d is age of daughter\r<BR>\n" );
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document.write( "Now, f = 2d\r<BR>\n" );
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document.write( "Ten years ago<BR>\n" );
document.write( "(f - 10) = 3(d - 10)\r<BR>\n" );
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document.write( "Replacing f with 2d and expanding<BR>\n" );
document.write( "2d - 10 = 3d - 30<BR>\n" );
document.write( "20 = d<BR>\n" );
document.write( "f = 40\r<BR>\n" );
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document.write( "So the father is now twice the age of his daughter (40 = 2 x 20)<BR>\n" );
document.write( "Ten years ago the father was three times the age of his daughter (30 = 3 x 10)<BR>\n" );
document.write( "The answer is the father is now 40 years and the daughter is 20 years.<BR>\n" );
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