document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=547714>Question 547714</A>: <I><SPAN STYLE=\"word-break: break-all;\"> it takes Ellen 9 hours to drive to a friend's cabin. Her sister Barb can make the drive in 8 hours by traveling 7mph faster than Ellen. What is Barb's average speed?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #356502 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=356502\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Let the distance be y<BR>\n" );
document.write( "it is the same for both<BR>\n" );
document.write( "the speeds are different\r<BR>\n" );
document.write( "\n" );
document.write( "y/x=9<BR>\n" );
document.write( "y=9x\r<BR>\n" );
document.write( "\n" );
document.write( "y/x+7 =8<BR>\n" );
document.write( "y=8(x+7)\r<BR>\n" );
document.write( "\n" );
document.write( "9x=8(x+7)<BR>\n" );
document.write( "9x=8x+56<BR>\n" );
document.write( "9x-8x=56<BR>\n" );
document.write( "x=56 Ellen's speed\r<BR>\n" );
document.write( "\n" );
document.write( "Barb's speed = 56+7 = 63 mph\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );