document.write( "Question 548626: A fishing boat broke down after traveling 2 hours against a 4 km/hr current. The boat was carried back to its starting point by the current. The whole trip took 5.5 hours. Find the speed of the boat in still water before the motor failed. \n" ); document.write( "
Algebra.Com's Answer #357114 by mananth(16946)\"\" \"About 
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Let the boat speed be x mph
\n" ); document.write( "against current (x-4)mph
\n" ); document.write( "distance traveled before breakdown = 2(x-4)
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\n" ); document.write( "time =2 hours\r
\n" ); document.write( "\n" ); document.write( "return
\n" ); document.write( "time =
\n" ); document.write( "2(x-4)/4\r
\n" ); document.write( "\n" ); document.write( "2(x-4)/4 + 2 = 5.5\r
\n" ); document.write( "\n" ); document.write( "1/2(x-4)=3.5\r
\n" ); document.write( "\n" ); document.write( "x-4 = 7
\n" ); document.write( "x=11 mph
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