document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=122739>Question 122739</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having major problems with this word problem:\r<BR>\n" );
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document.write( "On a round trip of 252 miles in each direction, the average rate of travel going was 7 mph more than the rate returning. Find the rate for each direction if the entire trip took 21 hours. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #90095 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=90095\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 252/(x+7)+252/x=21<BR>\n" );
document.write( "[252x+252(x+7)]/x(x+7)=21<BR>\n" );
document.write( "[252x+252x+1764]/(x^2+7x)=21 now cross multiply.<BR>\n" );
document.write( "21x^2+147x=504x+1764<BR>\n" );
document.write( "21x^2+147x-504x-1764=0<BR>\n" );
document.write( "21x^2-357x-1764=0<BR>\n" );
document.write( "21(x^2-17x-84)=0<BR>\n" );
document.write( "21(x-21)(x+4)=0<BR>\n" );
document.write( "x-21=0<BR>\n" );
document.write( "x=21 return trip speed.<BR>\n" );
document.write( "21+7=28 for the going speed.<BR>\n" );
document.write( "proof<BR>\n" );
document.write( "252/28+252/21=21<BR>\n" );
document.write( "9+12=21<BR>\n" );
document.write( "21=21 </SPAN>\n" );
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