document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122904>Question 1122904</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat can travel 15 miles per hour downstream and 9 moles per hour upstream on a certain river. Find the rate of its current and the rate at which the boat can travel 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 #739072 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=739072\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> speed=x<BR>\n" );
document.write( "current=c<BR>\n" );
document.write( "x+c=15<BR>\n" );
document.write( "x-c=9<BR>\n" );
document.write( "add them<BR>\n" );
document.write( "2x=24<BR>\n" );
document.write( "x=12 mph speed in still water<BR>\n" );
document.write( "c=3 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );