document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=23019>Question 23019</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I know there's a similar problem, but got very confused by the way the set-up was formatted in the response.  Can someone pllleeeeease help?  All I need is to see which numbers & variables go where, then I should be able to solve it.  Thanks in advance!\r<BR>\n" );
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document.write( "In still water a boat can travel 15 mph.  It travels 36 miles upstream & 36 miles downstream in a total time of 5 hours.  Find the speed of the current. (The book says the answer is 3 mph) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #11404 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=11404\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = speed of the current<BR>\n" );
document.write( "15 +x = speed of the boat downstream (with the current)<BR>\n" );
document.write( "15-x = speed of the boat upstream (against the current)<BR>\n" );
document.write( "Distance upstream = Distance downstream = 36 miles\r<BR>\n" );
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document.write( "D=RT<BR>\n" );
document.write( "T= D/R\r<BR>\n" );
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document.write( "Total Time = D/R + D/R = 5 hours<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=36%2F%2815%2Bx%29+%2B+36%2F%2815-x%29+=+5 ALIGN=MIDDLE  ALT=\"36%2F%2815%2Bx%29+%2B+36%2F%2815-x%29+=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Multiply both sides of the equation by the LCD which is (15+x)(15-x):<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2815%2Bx%29%2815-x%29%2A%2836%2F%2815%2Bx%29%29+%2B+%2815%2Bx%29%2815-x%29%2A36%2F%2815-x%29+=+5%2A%2815%2Bx%29%2815-x%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=36%2815-x%29+%2B+36%2815%2Bx%29+=+5%28225-x%5E2%29 ALIGN=MIDDLE  ALT=\"36%2815-x%29+%2B+36%2815%2Bx%29+=+5%28225-x%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+540+-+36x+%2B+540+%2B+36x+=+1125+-+5x%5E2 ALIGN=MIDDLE  ALT=\"+540+-+36x+%2B+540+%2B+36x+=+1125+-+5x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1080+=+1125+-+5x%5E2 ALIGN=MIDDLE  ALT=\"1080+=+1125+-+5x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1080-1125+=+-5x%5E2 ALIGN=MIDDLE  ALT=\"1080-1125+=+-5x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-45+=+-5x%5E2 ALIGN=MIDDLE  ALT=\"-45+=+-5x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2=9 ALIGN=MIDDLE  ALT=\"x%5E2=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x= 3 or x= -3\r<BR>\n" );
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document.write( "Reject the negative answer.  x=3 mph = speed of the current.\r<BR>\n" );
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document.write( "R^2 at SCC\r<BR>\n" );
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document.write( " </SPAN>\n" );
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