document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=266450>Question 266450</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A truck travels for 4 hours at an average speed of 42 miles per hour. How much longer must the truck travel at an average speed of 55 miles per hour so that the average speed for the total trip is 50 miles per hour. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #195765 by </B><A HREF=/tutors/aboutme.mpl?userid=drk><B>drk(1908)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=drk><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=195765\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is an RTD problem. We can create the following table based on given information.<BR>\n" );
document.write( "truck . . . . . .rate . . . . . .time . . . . . distance<BR>\n" );
document.write( "truck . . . . . . 42 . . . . . . . .4 . . . . . . . .168<BR>\n" );
document.write( "truck . . . . . . 55 . . . . . . . .x . . . . . . . .55x<BR>\n" );
document.write( "totals. . . . . . 50. . . . . . . .4+x. . . . . . . 200 + 50x<BR>\n" );
document.write( "looking at column three we get<BR>\n" );
document.write( "168 + 55x = 200 + 50x<BR>\n" );
document.write( "subtract 168 to get<BR>\n" );
document.write( "55x = 32 + 50x<BR>\n" );
document.write( "subtract 50x to get<BR>\n" );
document.write( "5x = 32<BR>\n" );
document.write( "divide to get<BR>\n" );
document.write( "x = 6.4 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );