Question 1204226
<pre>
                    SPEED          TIME          DISTANCE
 
WITH WIND          345+w            x               d

AGAINST            345-w            x             1645
</pre>
Description indicates speed of wind, w, the equal time each way, x, and the distance with the wind, d,
are all unknown.  More information is needed if you want a value result for w.


The best to be done with what you have is 

{{{d/(w+345)=1645/(345-w)}}}

-

{{{1645(w+345)=d(345-w)}}}

{{{1645w+1645*345=345d-dw}}}

{{{1645w+dw=345d-1645*345}}}

{{{w(1645+d)=345d-1645*345}}}

{{{highlight_green(w=(345d-1645*345)/(d+1645))}}}