document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=290623>Question 290623</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Erica's uncle is three times as old as she is now. Four years ago, he was four times as old as she was then. How old is Erica now? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #210329 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=210329\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Erica's uncle is three times as old as she is now. Four years ago, he was four times as old as she was then. How old is Erica now?\r<BR>\n" );
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document.write( "Let Erica's present age be E, and her uncle's U\r<BR>\n" );
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document.write( "Then we'll have U = 3E, since her uncle is three times her present age\r<BR>\n" );
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document.write( "Since the uncle's present age is 3E, then four years ago, he was 3E - 4, and Erica was E - 4 years-old. Since he was four times her age then, we'll then have:  \r<BR>\n" );
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document.write( "3E - 4 = 4(E - 4)\r<BR>\n" );
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document.write( "3E - 4 = 4E - 16\r<BR>\n" );
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document.write( "-E = - 12\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=E+=+%28-12%29%2F-1+=+12 ALIGN=MIDDLE  ALT=\"E+=+%28-12%29%2F-1+=+12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Therefore, E, or Erica is currently <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2812%29 ALIGN=MIDDLE  ALT=\"highlight_green%2812%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > years-old. </SPAN>\n" );
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