document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=153960>Question 153960</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Ryan drives to Pittsburgh at 55 mph and returns by a road 10 miles shorter at 60 mph.  The return trip takes 30 minutes less.  How long is each road? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #113340 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=113340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Ryan drives to Pittsburgh at 55 mph and returns by a road 10 miles shorter at 60 mph. The return trip takes 30 minutes less. How long is each road?<BR>\n" );
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document.write( "let d = distance of the original trip<BR>\n" );
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document.write( "(d-10) = distance of the return trip<BR>\n" );
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document.write( "Convert 30 min to hrs; .5 hrs<BR>\n" );
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document.write( "Write a time equation:<BR>\n" );
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document.write( "to time = return time + one-half hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2F55 ALIGN=MIDDLE  ALT=\"d%2F55\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28d-10%29%29%2F60 ALIGN=MIDDLE  ALT=\"%28%28d-10%29%29%2F60\"   DISABLED_style= \"max-width:90%; height:auto;\" > + .5<BR>\n" );
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document.write( "Multiply equation by 3300 to get rid of the denominator (55*60)<BR>\n" );
document.write( "60d = 55(d-10) + 3300(.5)<BR>\n" );
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document.write( "60d = 55d - 550 + 1650<BR>\n" );
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document.write( "60d - 55d = 1100<BR>\n" );
document.write( "d = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1100%2F5 ALIGN=MIDDLE  ALT=\"1100%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d = 220 mile is the original trip and 210 miles is the return trip<BR>\n" );
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document.write( "Check solution by finding the time for each trip<BR>\n" );
document.write( "220/55 = 4 hrs<BR>\n" );
document.write( "210/60 = 3.5 hrs </SPAN>\n" );
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