Question 962284
r+w, speed with wind
r-w, speed against wind
w, speed of wind
d, distance refered
T, time against wind
t, time with wind
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UNKNOWN: r, w
KNOWN: d=896, T=7, t=4


{{{system((r+w)T=d,(r-w)*t=d )}}}


Final goal is to solve for r and w but get the value for w.
Solve for r and substitute to find w.