document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=110023>Question 110023</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat traveled 210 miles downstream and back ( 210 miles each way ).  The trip downstream took 10 hours.  The trip back took 70 hours.  What is the speed of the boat in still water? What is the speed of the current?\r<BR>\n" );
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document.write( "For the current speed I came up with the answer of 8.3 mph. But I could not figure out the speed 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 #80288 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=80288\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let b=boat, c=current ... b+c=210/10 ... b+c=21 ... b-c=210/70 ... b-c=3\r<BR>\n" );
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document.write( "(b+c)+(b-c)=21+3 ... 2b=24 ... b=12\r<BR>\n" );
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document.write( "12+c=21 ... c=9 </SPAN>\n" );
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