document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=323432>Question 323432</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Michael drove to a friend`s house a rate of 40 mph. he came back by the same route, but at a rate of 45 mph. if the round-trip took 4 hours what is the distance to his friend`s house? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #231483 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=231483\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT<BR>\n" );
document.write( "D=40T  FIRST TRIP<BR>\n" );
document.write( "D=45(4-T) RETURN TRIP<BR>\n" );
document.write( "THE DISTANCES ARE THE SAME TEREFORE THE EQUATIONS ARE THE SAME.<BR>\n" );
document.write( "40T=45(4-T)<BR>\n" );
document.write( "40T=180-45T<BR>\n" );
document.write( "40t+45T=180<BR>\n" );
document.write( "85T=180<BR>\n" );
document.write( "T=180/85<BR>\n" );
document.write( "T=2.118 HRS. FOR THE FIRST TRIP.<BR>\n" );
document.write( "4-2.118=1.88 HRS. FOR THE RETURN TRIP.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "40*2.118=45*1.88<BR>\n" );
document.write( "84.7~84.7 <BR>\n" );
document.write( "2*84.7=169.4 MILES IS THE DISTANCE OF THE ROUND TRIP. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );