document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=266105>Question 266105</A>: <I><SPAN STYLE=\"word-break: break-all;\">      The question is:  Two cars start at the same point and travel in opposite directions.  One car travels 5 mph faster than the other car.  After 4 hrs, the two cars are 420 miles apart.  Find the speed of each car.  \r<BR>\n" );
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document.write( "     One set of equations I tried was x+y=4, 5x+y=420, and another set was x+y=420, 5x+4y=420.  I was unable to get the correct answers with either set of equations.  Thanks for your help!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #195556 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=195556\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> By far, the easiest way to solve this is to just visualize it<BR>\n" );
document.write( "and don't think of it as 2 cars, but 1 car which is going at <BR>\n" );
document.write( "the combined speed of both cars. You don't care where that 1 <BR>\n" );
document.write( "car starts from. All you care about is that it goes <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=420 ALIGN=MIDDLE  ALT=\"420\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4 ALIGN=MIDDLE  ALT=\"4\"   DISABLED_style= \"max-width:90%; height:auto;\" > hrs. Call the speed <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+%2B+s+%2B+5 ALIGN=MIDDLE  ALT=\"s+%2B+s+%2B+5\"   DISABLED_style= \"max-width:90%; height:auto;\" >, the combined speed.<BR>\n" );
document.write( "The equation would be:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=420+=+%28s+%2B+s+%2B+5%29%2A4 ALIGN=MIDDLE  ALT=\"420+=+%28s+%2B+s+%2B+5%29%2A4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=420+=+8s+%2B+20 ALIGN=MIDDLE  ALT=\"420+=+8s+%2B+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8s+=+400 ALIGN=MIDDLE  ALT=\"8s+=+400\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+50 ALIGN=MIDDLE  ALT=\"s+=+50\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+%2B+5+=+55 ALIGN=MIDDLE  ALT=\"s+%2B+5+=+55\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi/hr<BR>\n" );
document.write( "The faster car goes 55 mi/hr and<BR>\n" );
document.write( "the slower car goes 50 mi/hr<BR>\n" );
document.write( "check answers:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5B1%5D+=+55%2A4 ALIGN=MIDDLE  ALT=\"d%5B1%5D+=+55%2A4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5B1%5D+=+220 ALIGN=MIDDLE  ALT=\"d%5B1%5D+=+220\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5B2%5D+=+50%2A4 ALIGN=MIDDLE  ALT=\"d%5B2%5D+=+50%2A4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%5B2%5D+=+200 ALIGN=MIDDLE  ALT=\"d%5B2%5D+=+200\"   DISABLED_style= \"max-width:90%; height:auto;\" > mi<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200+%2B+220+=+420 ALIGN=MIDDLE  ALT=\"200+%2B+220+=+420\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK\r<BR>\n" );
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document.write( " \r<BR>\n" );
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document.write( " </SPAN>\n" );
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