document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=612871>Question 612871</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a father is now four times as old as his son. five years ago he was seven times as old as his son. how old are tehy now?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #385757 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=385757\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a father is now four times as old as his son. five years ago he was seven times as old as his son. how old are they now?<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "f = 4s<BR>\n" );
document.write( "f-5 = 7(s-5)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"f\" and solve for \"s\":\r<BR>\n" );
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document.write( "4s - 5 = 7s - 35<BR>\n" );
document.write( "3s = 30<BR>\n" );
document.write( "s = 10 (Son's age now)<BR>\n" );
document.write( "----<BR>\n" );
document.write( "solve for \"f\";<BR>\n" );
document.write( "f = 4s<BR>\n" );
document.write( "f = 40 (Father's age now)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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