document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=928581>Question 928581</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat traveled for 1 hour with a 2 mph current. The return trip against the same current took 2 hours. Find the speed of the motorboat 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 #563694 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=563694\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = speed of boat in still water<BR>\n" );
document.write( "y = one-way trip distance<BR>\n" );
document.write( "c = speed of current = 2 mph<BR>\n" );
document.write( "---<BR>\n" );
document.write( "s = d/t<BR>\n" );
document.write( "---<BR>\n" );
document.write( "downstream:<BR>\n" );
document.write( "x + c = y/1<BR>\n" );
document.write( "x + 2 = y/1<BR>\n" );
document.write( "---<BR>\n" );
document.write( "upstream:<BR>\n" );
document.write( "x - c = y/2<BR>\n" );
document.write( "x - 2 = y/2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "put the system of linear equations into standard form<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x + 2 = y/1<BR>\n" );
document.write( "x - 2 = y/2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - y/1 = -2<BR>\n" );
document.write( "x - y/2 = 2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x - y = -2<BR>\n" );
document.write( "x - 0.5y = 2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "copy and paste the above standard form linear equations in to this solver:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "solution:<BR>\n" );
document.write( "x = speed of boat in still water = 6 mph<BR>\n" );
document.write( "y = one-way trip distance = 8 miles<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve and graph linear equations:<BR>\n" );
document.write( "https://sooeet.com/math/linear-equation-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve quadratic equations, quadratic formula:<BR>\n" );
document.write( "https://sooeet.com/math/quadratic-formula-solver.php<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve systems of linear equations up to 6-equations 6-variables:<BR>\n" );
document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );