document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=335696>Question 335696</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having a hard time figuring this word problem out. Can you please help.<BR>\n" );
document.write( "Upstream, downstream. Junior’s boat will go 15 miles per<BR>\n" );
document.write( "hour in still water. If he can go 12 miles downstream in the<BR>\n" );
document.write( "same amount of time as it takes to go 9 miles upstream,<BR>\n" );
document.write( "then what is 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 #240692 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=240692\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Rate*Time=Distance<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
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document.write( "Let's call the speed of the current C.<BR>\n" );
document.write( "When you go downstream, you add the speed of the boat and the current,<BR>\n" );
document.write( "1.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2815%2BC%29t=12 ALIGN=MIDDLE  ALT=\"%2815%2BC%29t=12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "When you go upstream, you subtract the current from the boat speed,<BR>\n" );
document.write( "2.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2815-C%29t=9 ALIGN=MIDDLE  ALT=\"%2815-C%29t=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "From eq. 1,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=12%2F%2815%2BC%29 ALIGN=MIDDLE  ALT=\"t=12%2F%2815%2BC%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substitute into eq. 2,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2815-C%29%2A%2812%2F%2815%2BC%29%29=9 ALIGN=MIDDLE  ALT=\"%2815-C%29%2A%2812%2F%2815%2BC%29%29=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%2815-C%29=9%2815%2BC%29 ALIGN=MIDDLE  ALT=\"12%2815-C%29=9%2815%2BC%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=180-12C=135%2B9C ALIGN=MIDDLE  ALT=\"180-12C=135%2B9C\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-21C=-45 ALIGN=MIDDLE  ALT=\"-21C=-45\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C=45%2F21=15%2F7 ALIGN=MIDDLE  ALT=\"C=45%2F21=15%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );