document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=862301>Question 862301</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Q. A jet made a trip to the maintenance facility and back. The trip there took three hours and the trip back took four hours. It averaged 120km/h faster on the trip there than on the return trip. Find the jet's average speed on the outbound trip.\r<BR>\n" );
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document.write( "I know the answer is 480 miles on the answer sheet, but I'm really confused why<BR>\n" );
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document.write( "3(x+120) = 4x <BR>\n" );
document.write( "isnt the same thing as <BR>\n" );
document.write( "4(x-120)=3x \r<BR>\n" );
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document.write( "doesn't it mean the same thing?\r<BR>\n" );
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document.write( "Thanks  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #519658 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=519658\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4(x-120)=3x <BR>\n" );
document.write( "4x-480-3x<BR>\n" );
document.write( "x-480=0<BR>\n" );
document.write( "x=480<BR>\n" );
document.write( "x is the speed on the outbound trip <BR>\n" );
document.write( "x-120=360 return trip\r<BR>\n" );
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document.write( "3(y+120) = 4y <BR>\n" );
document.write( "3y+360=4y<BR>\n" );
document.write( "360=y the return<BR>\n" );
document.write( "y+120=480 the  outbound trip there<BR>\n" );
document.write( "y is average speed on the return trip\r<BR>\n" );
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document.write( "Which should you use?  \r<BR>\n" );
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document.write( "If you are only interested in the outbound then use the first 4(x-120)=3x <BR>\n" );
document.write( "If you are only interested in the return then use the second 3(y+120) = 4y <BR>\n" );
document.write( "If you want to find out both speeds then it doesn't matter which one you use.<BR>\n" );
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