document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923491>Question 923491</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat travels 42 miles up the river in the same amount of time it takes to travel 58 miles down the same river. If the current is 4 miles per hour, what is the speed of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #560095 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><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=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=560095\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> up:<BR>\n" );
document.write( "s = d/t<BR>\n" );
document.write( "b - c = d/t<BR>\n" );
document.write( "b - c = 42/t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "down:<BR>\n" );
document.write( "s = d/t<BR>\n" );
document.write( "b + c = d/t<BR>\n" );
document.write( "b + c = 58/t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "c = 4<BR>\n" );
document.write( "---<BR>\n" );
document.write( "b - 4 = 42/t<BR>\n" );
document.write( "b + 4 = 58/t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "b = 42/t + 4<BR>\n" );
document.write( "b = 58/t - 4<BR>\n" );
document.write( "---<BR>\n" );
document.write( "42/t + 4 = 58/t - 4<BR>\n" );
document.write( "8 = 58/t - 42/t<BR>\n" );
document.write( "8 = (58 - 42)/t<BR>\n" );
document.write( "8 = 16/t<BR>\n" );
document.write( "t = 16/8<BR>\n" );
document.write( "t = 2 hours<BR>\n" );
document.write( "---<BR>\n" );
document.write( "b + 4 = 58/2<BR>\n" );
document.write( "b = 58/2 - 4<BR>\n" );
document.write( "b = 29 - 4<BR>\n" );
document.write( "---<BR>\n" );
document.write( "answer:<BR>\n" );
document.write( "b = 25 mph<BR>\n" );
document.write( "---<BR>\n" );
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document.write( "---<BR>\n" );
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document.write( "---<BR>\n" );
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document.write( "---<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );