document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=764352>Question 764352</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat travels upstream at 7 mph, while it travels downstream at 12 mph. What is the speed of the motorboat in still water? 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 #465379 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=465379\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A motorboat travels upstream at 7 mph, while it travels downstream at 12 mph. What is the speed of the motorboat in still water? What is the speed of the current?<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=speed of boat in still water<BR>\n" );
document.write( "let c=speed of current<BR>\n" );
document.write( "(x+c)=speed of motorboat downstream<BR>\n" );
document.write( "(x-c)=speed of motorboat upstream<BR>\n" );
document.write( "..<BR>\n" );
document.write( "x-c=7<BR>\n" );
document.write( "x+c=12<BR>\n" );
document.write( "add<BR>\n" );
document.write( "2x=19<BR>\n" );
document.write( "x=9.5<BR>\n" );
document.write( "c=x-7=2.5<BR>\n" );
document.write( "speed of boat in still water=9.5 mph<BR>\n" );
document.write( "speed of current=2.5 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );