document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1160090>Question 1160090</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Word problem:  David gets to work in 20 minutes when he drives his car. Riding his bike (by the same route) takes him 45 minutes.  His average driving speed is 4.5mph greater than his average speed on his bike. How far does he travel to work?\r<BR>\n" );
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document.write( "I have an answer key, but can't figure out how to get the right answer. I've tried several equations to no avail.\r<BR>\n" );
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document.write( "Thanks,<BR>\n" );
document.write( "Daniel </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #783232 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=783232\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "           SPEED             TIMEin hours    DISTANCE\r\n" );
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document.write( "BIKE         r               <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2F4 ALIGN=MIDDLE  ALT=\"3%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >             d\r\n" );
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document.write( "CAR          r+4.5           <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >             d\r\n" );
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document.write( "The same distance whichever vehicle used.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%29%283%2F4%29=d=%28r%2B4.5%29%281%2F3%29 ALIGN=MIDDLE  ALT=\"%28r%29%283%2F4%29=d=%28r%2B4.5%29%281%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28r%29%283%2F4%29=%28r%2B4.5%29%281%2F3%29 ALIGN=MIDDLE  ALT=\"%28r%29%283%2F4%29=%28r%2B4.5%29%281%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Simplify and solve this for r.\r<BR>\n" );
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document.write( "3.6 mph for bicycle </SPAN>\n" );
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