document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=972840>Question 972840</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a boat travelling upstream goes 120 miles in 6 hours. If the return trip takes 4 hours what is speed in miles per hour of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #595054 by </B><A HREF=/tutors/aboutme.mpl?userid=anand429><B>anand429(138)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=anand429><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=anand429><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=595054\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let speed of boat in still water = x<BR>\n" );
document.write( "and speed of stream = y<BR>\n" );
document.write( "Speed upstream = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-y%29+=+%28120%2F6%29 ALIGN=MIDDLE  ALT=\"%28x-y%29+=+%28120%2F6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >mph<BR>\n" );
document.write( "Speed downstream = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%2By%29+=+%28120%2F4%29 ALIGN=MIDDLE  ALT=\"%28x%2By%29+=+%28120%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph<BR>\n" );
document.write( "So adding both equations,<BR>\n" );
document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x+=+20+%2B+30 ALIGN=MIDDLE  ALT=\"2x+=+20+%2B+30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "=> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=25 ALIGN=MIDDLE  ALT=\"x=25\"   DISABLED_style= \"max-width:90%; height:auto;\" >mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );