document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=529922>Question 529922</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car and bus leave at the same time and travel to the same place. The car travels 21 mph faster than the bus and gets there in four hours. The bus gets there two hours later. Find the speed of the bus and car. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #349784 by </B><A HREF=/tutors/aboutme.mpl?userid=boilpoil><B>boilpoil(127)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=boilpoil><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=boilpoil><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=349784\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We could try using algebra:\r<BR>\n" );
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document.write( "Let the speed of car be x<BR>\n" );
document.write( "Then the speed of bus is x-21\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x=6%28x-21%29 ALIGN=MIDDLE  ALT=\"4x=6%28x-21%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > ---The speed of the car is x, it traveled 4 hours, so 4x represents the total distance, the bus uses 6 hours with a speed of x-21 so it also represents the distance<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x=6x-126 ALIGN=MIDDLE  ALT=\"4x=6x-126\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2x=-126 ALIGN=MIDDLE  ALT=\"-2x=-126\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=63%28mph%29 ALIGN=MIDDLE  ALT=\"x=63%28mph%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " The speed of bus<BR>\n" );
document.write( "=63-21<BR>\n" );
document.write( "=42(mph)\r<BR>\n" );
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document.write( " </SPAN>\n" );
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