On April 18, 2004, the fifth speed increase of National Railways was made. Among them, 1084 trains from Urumqi to Chongqing had the largest speed increase. The whole journey was shortened by 9h. It is known that the journey from Urumqi to Chongqing is 3405km. The average speed before the speed increase is about 52km / h. the average speed after the speed increase is calculated. If the average speed after the speed increase is XKM / h, the equation can be formulated as follows:———————————— Reward for correct answer

On April 18, 2004, the fifth speed increase of National Railways was made. Among them, 1084 trains from Urumqi to Chongqing had the largest speed increase. The whole journey was shortened by 9h. It is known that the journey from Urumqi to Chongqing is 3405km. The average speed before the speed increase is about 52km / h. the average speed after the speed increase is calculated. If the average speed after the speed increase is XKM / h, the equation can be formulated as follows:———————————— Reward for correct answer

3405/52 - 3405/x =9