Algebra
posted by Jack .
An executive flew in the corporate jet to a meeting in a city 1700 kilometers away. After traveling the same amount of time on the return flight, the pilot mentioned that they still had 300 kilometers to go. The air speed of the plane was 600 kilometers per hour. How fast was the wind blowing? (Assume that the wind direction was parallel to the flight path and constant all day.)

time = distance / speed, so
1700/(600+x) = 1400/(600x)
x = 58.065 km/hr