document.write( "Question 509589: Rhine river is 160km shorter than St lawerence. The amazon is 800km longer than 5 times the length of the Rhine. Zambezi is is 2x as long as the St lawerence. How long is the Amazon if it is 1440km longer than the sum of the lenghts of the other 3 rivers \n" ); document.write( "
Algebra.Com's Answer #341818 by Maths68(1474)\"\" \"About 
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St. Lawerence River = x
\n" ); document.write( "Zambezi River = 2x
\n" ); document.write( "Rhine River = x-160
\n" ); document.write( "Amazon = 800+5(x-160)
\n" ); document.write( "=================================================================
\n" ); document.write( "Amazon = (St. Lawerence River + Zambezi River + Rhine River)+1440
\n" ); document.write( "800+5(x-160) = x+(2x)+(x-160)+1440
\n" ); document.write( "800+5x-800= x+2x+x-160+1440
\n" ); document.write( "5x=4x+1280
\n" ); document.write( "5x= 4x+1280
\n" ); document.write( "5x-4x=1280
\n" ); document.write( "x=1280
\n" ); document.write( "===================================================================
\n" ); document.write( "Amazon = 800+5(x-160)
\n" ); document.write( "Put the value of x in above equation
\n" ); document.write( "Amazon = 800+5(1280-160)
\n" ); document.write( "Amazon=800+5(1120)
\n" ); document.write( "Amazon = 800+5600
\n" ); document.write( "Amazon=6400 km
\n" ); document.write( " \n" ); document.write( "
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