document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=678791>Question 678791</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If I traveled 60 mph and was an hour early, and traveled 30 mph and was an hour late how far was the airport? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #421629 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=421629\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let t = time it takes to travel a distance of d miles (and be on time)\r<BR>\n" );
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document.write( "So to be an hour early, it would mean that you travel 1 hour less than normal, which means that you spend t-1 hours on the road.\r<BR>\n" );
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document.write( "To be an hour late, you add 1 to t to get t+1 hours.\r<BR>\n" );
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document.write( "Being 1 hr early\r<BR>\n" );
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document.write( "d = rt\r<BR>\n" );
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document.write( "d = 60t\r<BR>\n" );
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document.write( "d = 60(t-1)\r<BR>\n" );
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document.write( "Being 1 hr late\r<BR>\n" );
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document.write( "d = rt\r<BR>\n" );
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document.write( "d = 30t\r<BR>\n" );
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document.write( "d = 30(t+1)\r<BR>\n" );
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document.write( "Equate the two and solve for t\r<BR>\n" );
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document.write( "60(t-1) = 30(t+1)\r<BR>\n" );
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document.write( "60t-60 = 30t+30\r<BR>\n" );
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document.write( "60t-30t = 30+60\r<BR>\n" );
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document.write( "30t = 90\r<BR>\n" );
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document.write( "t = 90/30\r<BR>\n" );
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document.write( "t = 3\r<BR>\n" );
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document.write( "So if you arrive on time, then you will spend 3 hours on the road. Being early means you only spend 2 hours on the road and being late means you spend 4 hours on the road.\r<BR>\n" );
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document.write( "Use this to find d\r<BR>\n" );
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document.write( "d = 60(t-1)\r<BR>\n" );
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document.write( "d = 60(3-1)\r<BR>\n" );
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document.write( "d = 120\r<BR>\n" );
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document.write( "Therefore, the distance is <font color=\"red\">120 miles</font>. </SPAN>\n" );
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