document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=161431>Question 161431</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A river has a current of 4mph. Find the speed of Simon's boat in still water if it goes 40 miles downstream in the same time as 24 miles upstream. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #118941 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=118941\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT<BR>\n" );
document.write( "40=(X+4)T OR T=40/(X+4)<BR>\n" );
document.write( "24=(X-4)T OR T=24/(X-4)<BR>\n" );
document.write( "40/(X+4)=24/(X-4) CROSS MULTIPLY.<BR>\n" );
document.write( "40(X-4)=24(X+4)<BR>\n" );
document.write( "40X-160=24X+96<BR>\n" );
document.write( "40X-24X=96+160<BR>\n" );
document.write( "16X=256<BR>\n" );
document.write( "X=256/16<BR>\n" );
document.write( "X=16 MPH IS THE SPEED OF THE BOAT.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "40/(16+4)=24/(16-4)<BR>\n" );
document.write( "40/20=24/12<BR>\n" );
document.write( "2=2\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );