document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=810814>Question 810814</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat travels 18 mph in still water can travel 22 miles downstream in the same time as it takes to travel. 14 miles upstream. Find the speed of the current river. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #488442 by </B><A HREF=/tutors/aboutme.mpl?userid=erica65404><B>erica65404(394)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=erica65404><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=erica65404><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=488442\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> to find the rate of the water you need to use the speed of the boat.<BR>\n" );
document.write( "distance/rate<BR>\n" );
document.write( "we are going to put downstream on one side and upstream on the other.<BR>\n" );
document.write( "the distance for downstream is 22 miles.  the rate is going to be 18 + x. The reason for this is because when you are going down a river, the river pushes you along and increases your speed.  The overall speed is going to be more than 18.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=22%2F%2818%2Bx%29 ALIGN=MIDDLE  ALT=\"22%2F%2818%2Bx%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The distance for going upstream is 14.  The rate is going to be 18 - x.  The river pushes against the boat causing the boat to slow down.  so the overall speed is going to be less than 18mph.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=14%2F%2818-x%29 ALIGN=MIDDLE  ALT=\"14%2F%2818-x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "now make them equal to each other.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=22%2F%2818%2Bx%29=14%2F%2818-x%29 ALIGN=MIDDLE  ALT=\"22%2F%2818%2Bx%29=14%2F%2818-x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "cross multiply and solve for x.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=22%2818-x%29=14%2818%2Bx%29 ALIGN=MIDDLE  ALT=\"22%2818-x%29=14%2818%2Bx%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=396-22x=252%2B14x ALIGN=MIDDLE  ALT=\"396-22x=252%2B14x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=144-22x=14x ALIGN=MIDDLE  ALT=\"144-22x=14x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=144=36x ALIGN=MIDDLE  ALT=\"144=36x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=4 ALIGN=MIDDLE  ALT=\"x=4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "the current of the water is 4mph. </SPAN>\n" );
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