document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1203109>Question 1203109</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It took a patrol boat 5 hours to travel 60 km up a river against the current, and 3 hours for the return trip with the current. Find the speed of the boat in still water and 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 #838400 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=838400\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "              SPEED        TIME       KM DISTANCE\r\n" );
document.write( "UP RIVER       r-c           5          60\r\n" );
document.write( "DOWN RVR.      r+c           3          60\r\n" );
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document.write( "Knowing speed multiplied by time is distance,  you can determine what to do.<BR>\n" );
document.write( "r, speed if no current<BR>\n" );
document.write( "c, speed of the current\r<BR>\n" );
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document.write( "This kind of example problem is too common.\r<BR>\n" );
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document.write( "Time up, u<BR>\n" );
document.write( "time down, b<BR>\n" );
document.write( "distance each way d\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28r-c=d%2Fu%2Cr%2Bc=d%2Fb%29 ALIGN=MIDDLE  ALT=\"system%28r-c=d%2Fu%2Cr%2Bc=d%2Fb%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "add corresponding members.<BR>\n" );
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document.write( "Subtract corresponding members, initial system.<BR>\n" );
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