The air speed of a plane is 150 mph. If the plane traveled the same distance in two hours with the wind as it flew in 3 hours against the wind, what was the wind speed?

d1 = d2.

(Vp+Vw)*t1 = (Vp-Vw)t2.
(150+Vw)*2 = (150-Vw)*3. Vw = ?.