document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=644926>Question 644926</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the rhine river is 160 km shorter than the st. lawrence river. the amazon river is 800 km longer than five times the length of the rhine river. the zambezi river is twice as long as the st. lawrence river. how long id the amazon if it is 1440 km longer than the sum of the other three rivers? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #405320 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=405320\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the rhine river is 160 km shorter than the st. lawrence river. the amazon river is 800 km longer than five times the length of the rhine river. the zambezi river is twice as long as the st. lawrence river. how long is the amazon if it is 1440 km longer than the sum of the other three rivers?<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "R = L-160<BR>\n" );
document.write( "A = 5R+800<BR>\n" );
document.write( "Z = 2L<BR>\n" );
document.write( "---<BR>\n" );
document.write( "A = R+L+Z + 1440<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Substitute for \"A:<BR>\n" );
document.write( "5R + 800 = R+L+Z+1440<BR>\n" );
document.write( "4R = L+Z+640<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Substitute for \"R\" and for \"Z\" :<BR>\n" );
document.write( "4(L-160) = L + 2L +640<BR>\n" );
document.write( "4L - 640 = 3L +640<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "L = 1280 km (length of the St. Lawrence)<BR>\n" );
document.write( "Z = 2L = 2560 km ( length of the Zambezie<BR>\n" );
document.write( "R = L-160 = 1120(length of the Rhine)<BR>\n" );
document.write( "A = 5R+800 = 5*1120 + 800 = 6400 km (length of the Amazon)<BR>\n" );
document.write( "================================================================<BR>\n" );
document.write( "===============================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );