document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=207886>Question 207886</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My motor boat normally travels at 24 km/h in still water. One day I travelled 36 km against a constant current in a river and it took me the same time to travel 48 km with the current. How fast was 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 #157246 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=157246\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The basic formula is d=rt, and since the equation is based upon the fact that time up stream is equal to time downstream, it will be helpful to solve for t.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=d%2Fr ALIGN=MIDDLE  ALT=\"t=d%2Fr\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Let x = rate of current.<BR>\n" );
document.write( "24 = rate in still water \r<BR>\n" );
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document.write( "24+x = rate downstream<BR>\n" );
document.write( "24-x = rate upstream\r<BR>\n" );
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document.write( "time downstream = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2Fr=48%2F%2824%2Bx%29 ALIGN=MIDDLE  ALT=\"d%2Fr=48%2F%2824%2Bx%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "time upstream = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d%2Fr=36%2F%2824-x%29 ALIGN=MIDDLE  ALT=\"d%2Fr=36%2F%2824-x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Solve the equation:  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=48%2F%2824%2Bx%29+=+36%2F%2824-x%29+ ALIGN=MIDDLE  ALT=\"48%2F%2824%2Bx%29+=+36%2F%2824-x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2Fb=c%2Fd ALIGN=MIDDLE  ALT=\"a%2Fb=c%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" > means that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ad=bc ALIGN=MIDDLE  ALT=\"ad=bc\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=48%2F%2824%2Bx%29+=+36%2F%2824-x%29+ ALIGN=MIDDLE  ALT=\"48%2F%2824%2Bx%29+=+36%2F%2824-x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > means that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=48%2824-x%29+=+36%2824%2Bx%29+ ALIGN=MIDDLE  ALT=\"48%2824-x%29+=+36%2824%2Bx%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Get out your calculator:   <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1156+-48x+=+864%2B36x ALIGN=MIDDLE  ALT=\"1156+-48x+=+864%2B36x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1152-864+=+48x+%2B36x ALIGN=MIDDLE  ALT=\"1152-864+=+48x+%2B36x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=288=84x ALIGN=MIDDLE  ALT=\"288=84x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=288%2F84=24%2F7+ ALIGN=MIDDLE  ALT=\"x=288%2F84=24%2F7+\"   DISABLED_style= \"max-width:90%; height:auto;\" >   km/h\r<BR>\n" );
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document.write( "R^2\r<BR>\n" );
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document.write( "Dr. Robert J. Rapalje<BR>\n" );
document.write( "Altamonte Springs Campus<BR>\n" );
document.write( "Seminole State University </SPAN>\n" );
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