document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=675456>Question 675456</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Richard’s average driving speed is 6 kilometers per hour faster than Thor’s. In the same length of time it takes Richard to drive 640 kilometers, Thor drives only<BR>\n" );
document.write( "592 kilometers. What is Richard’s average speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #419847 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=419847\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Richard’s average driving speed is 6 kilometers per hour faster than Thor’s. In the same length of time it takes Richard to drive 640 kilometers, Thor drives only<BR>\n" );
document.write( "592 kilometers. What is Richard’s average speed?<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let x=Thor's average driving speed<BR>\n" );
document.write( "x+6=Richard's average driving speed<BR>\n" );
document.write( "Travel time=distance/speed (same for both)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "592/x=640/(x+6)<BR>\n" );
document.write( "592(x+6)=640x<BR>\n" );
document.write( "592x+3552=640x<BR>\n" );
document.write( "48x=3552<BR>\n" );
document.write( "x=74<BR>\n" );
document.write( "x+6=80<BR>\n" );
document.write( "Richard's average driving speed=80 km/hr </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );