document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=795251>Question 795251</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat makes a trip downstream in 1 hour.  It makes the upstream trip in the same current in 1.5 hours.  The speed of the boat is still water would've been 4 miles per hour.  What is the speed of the current? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #480910 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=480910\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Speed of current = x<BR>\n" );
document.write( "Speed of boat with current = 4 + x<BR>\n" );
document.write( "Speed of boat against current = 4 - x<BR>\n" );
document.write( "1 *(4 + x) = 1.5 * (4 - x)<BR>\n" );
document.write( "4 + x = 6 - 1.5x<BR>\n" );
document.write( "Collect like terms:<BR>\n" );
document.write( "x + 1.5x = 6 - 4<BR>\n" );
document.write( "2.5x = 2<BR>\n" );
document.write( "x = 2/2.5<BR>\n" );
document.write( "x = 0.8 mph.<BR>\n" );
document.write( "The speed of the current = 0.8 mph<BR>\n" );
document.write( "Hope this helps.<BR>\n" );
document.write( ":-) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );