document.write( "Question 813366: Julie and Eric row their boat (at a constant speed) 32 miles downstream for 4 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 8 hours. Find the rate of the current. \n" ); document.write( "
Algebra.Com's Answer #489606 by TimothyLamb(4379)\"\" \"About 
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s = d / t
\n" ); document.write( "d = s * t
\n" ); document.write( "---
\n" ); document.write( "b + w = 32/4 = 8 mph
\n" ); document.write( "b - w = 32/8 = 4 mph
\n" ); document.write( "b - w = 4 mph
\n" ); document.write( "b = 4 + w
\n" ); document.write( "---
\n" ); document.write( "b + w = 8
\n" ); document.write( "(4 + w) + w = 8
\n" ); document.write( "4 + 2w = 8
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\n" ); document.write( "w = 2 mph
\n" ); document.write( "b = 6 mph
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\n" ); document.write( "Answer:
\n" ); document.write( "the water current is moving at 4 mph
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