Question 465685
54/(x+3)+3=54/x
54x+3(x)(x+3)=54(x+3)
54x+3x2+9x=54x+162
3x2+9x-162=0
x2+3x-54=0
(x+9)(x-6)=0
x=-9 or 6
Throwing out the negative answer, we get the upstream speed of the canoe to be 6 kph, and the downstream speed to be 9 kph..