SOLUTION: A six-passenger plane cruises at 180MPH in calm air if the plane flies 7 miles with the wind in the same amount of time as it flies 5 miles against the wind, then what is the wind

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Question 304551: A six-passenger plane cruises at 180MPH in calm air if the plane flies 7 miles with the wind in the same amount of time as it flies 5 miles against the wind, then what is the wind speed?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(time) = (distance) / (rate)

7 / (180 + w) = 5 / (180 - w)

"cross" multiplying ___ 1260 - 7w = 900 + 5w

360 = 12w ___ 30 = w