document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=400485>Question 400485</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 4 years time, a father will be 3 times as old as his son. 6 years ago he was 7 times as old as his son. How old are they now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #283480 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=283480\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \"In 4 years time, a father will be 3 times as old as his son\" ___ f + 4 = 3(s + 4)\r<BR>\n" );
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document.write( "\"6 years ago he was 7 times as old as his son\" ___ f - 6 = 7(s - 6) ___ f - 6 = 7s - 42 ___ f = 7s - 36\r<BR>\n" );
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document.write( "substituting ___ (7s - 36) + 4 = 3s + 12\r<BR>\n" );
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document.write( "4s = 12 - 4 + 36 = 44 ___ s = 11\r<BR>\n" );
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document.write( "substituting ___ f = 7(11) - 36 ___ f = 41 </SPAN>\n" );
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