document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=632568>Question 632568</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My problem is a word problem that goes like this: A tugboat goes 120 miles upstream in 20 hours. The return trip downstream takes 10 hours. Find the speed of the tug boat without a current, and, find the speed of the current.\r<BR>\n" );
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document.write( "So, I have two variables x= tugboat speed,  and y = current speed,  I believe that this is basically a rate, time, distance type of problem. I tried to solve it like this: 120x20=2400   multiply<BR>\n" );
document.write( "              120x10=1200  add<BR>\n" );
document.write( "               =3600/2=1800   divide by 2\r<BR>\n" );
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document.write( "              1800-2400=-600,  1800-1200=600,   I know that this is incorrect,as it is impossible for a tugboat to go -600 mph, or for a river current to move at 600 mph. I saw a similar problem on this sight, but I think the asker formatted the problem improperly, because the answer was only one part, and the problem requires a two part answer, and it just does not fit this particular problem either. Can you help me understand how to solve this problem?   Thanks\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #398359 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=398359\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A tugboat goes 120 miles upstream in 20 hours. The return trip downstream takes 10 hours. Find the speed of the tug boat without a current, and, find the speed of the current. <BR>\n" );
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document.write( "Upstream DATA:<BR>\n" );
document.write( "distance = 120 miles ; time = 20 hrs ; rate = d/t = 120/20 = 6 mph<BR>\n" );
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document.write( "Downstream DATA:<BR>\n" );
document.write( "distance = 120 miles ; time = 10 hrs ; rate = d/t = 120/10 = 12 mph<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "b + c = 12 mph<BR>\n" );
document.write( "b - c = 6 mph<BR>\n" );
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document.write( "Add and solve for \"b\":<BR>\n" );
document.write( "2b = 18 mph<BR>\n" );
document.write( "boat speed = 9 mph<BR>\n" );
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document.write( "Solve for \"c\":<BR>\n" );
document.write( "b + c = 12 mph<BR>\n" );
document.write( "9 + c = 12<BR>\n" );
document.write( "current speed = 3 mph<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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