document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=402135>Question 402135</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A man is 3 times as old as his daughter. 4 years ago, the sum of their ages was 60 years. How old is the daughter?<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 #284504 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=284504\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A man is 3 times as old as his daughter. <BR>\n" );
document.write( "4 years ago, the sum of their ages was 60 years. <BR>\n" );
document.write( "How old is the daughter?<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "f = 3d<BR>\n" );
document.write( "(f-4)+(d-4) = 60<BR>\n" );
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document.write( "Substitute for \"f\" and solve for \"d\":<BR>\n" );
document.write( "(3d-4)+(d-4) = 60<BR>\n" );
document.write( "4d-8 = 60<BR>\n" );
document.write( "4d = 68<BR>\n" );
document.write( "d = 17 (daughter's age now)<BR>\n" );
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document.write( "Solve for \"f\":<BR>\n" );
document.write( "f = 3d<BR>\n" );
document.write( "f = 3*17 = 51 (father's age now)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "----\r<BR>\n" );
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