document.write( "Question 291595: the current of a river is 3 miles per hour . the speed of a motor boat going downstream is 1 2/3 times as fast as going upstream. it takes the motor boat a total of 2 hours 40 minutes to make a round trip between A and B; A and B are positions in the river . find the distance between A and B in miles\r
\n" ); document.write( "\n" ); document.write( "A 17 2/3 b 15 c 13 3/4 d 12 e 10 2/5
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Algebra.Com's Answer #210796 by richwmiller(17219)\"\" \"About 
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c=3
\n" ); document.write( "x+y=1 2/3
\n" ); document.write( "(b+c)*x=(b-c)*y
\n" ); document.write( "(b+c)=5/3*(b-c)
\n" ); document.write( "b = 12, c = 3, x = 1, y = 5/3
\n" ); document.write( "boat 12
\n" ); document.write( "downstream 15
\n" ); document.write( "upstream 9
\n" ); document.write( "5/3=15/9
\n" ); document.write( "15*1=15 miles from a to b
\n" ); document.write( "check
\n" ); document.write( "9*5/3=15
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