A passenger car and a freight car set out from a and B, 240 kilometers apart, and they went in opposite directions. The passenger car traveled 56 kilometers per hour, and it took 2.5 hours for the two cars to meet. During this period, it took 0.5 hours for the freight car to repair. How many kilometers does the freight car travel per hour? Use X to solve the equation?

A passenger car and a freight car set out from a and B, 240 kilometers apart, and they went in opposite directions. The passenger car traveled 56 kilometers per hour, and it took 2.5 hours for the two cars to meet. During this period, it took 0.5 hours for the freight car to repair. How many kilometers does the freight car travel per hour? Use X to solve the equation?

Let the total length of the journey be x km, and the meeting point be 1 / 2x + 32 ∵ when two cars meet, the travel time of two cars is the same ∵ (1 / 2x + 32) / 56 = (1 / 2x-32) / 48 ∵ (1 / 2x + 32) / 7 = (1 / 2x-32) / 6 (both sides of the equation multiply by 8) 6 (1 / 2x + 32) = 7 (1 / 2x-32) (both sides of the equation multiply by 42) 3x + 192 = 7 / 2x-2240.5x = 416X = 8

The fast train and the slow train leave from station a and station B at the same time. The fast train runs 70 kilometers per hour, and the slow train runs 56 kilometers per hour. When the two trains meet, they have the same speed
Du J goes on. The express train returns immediately after arriving at station B, and the local train returns immediately after arriving at station a. the two trains meet again. The local train runs 210 kilometers less than the express train. How many kilometers is the distance between the two stations?

The two vehicles have been driving all the time, so the driving time of the two vehicles is the same. If the driving time is set at t hours, the driving time is the same
（70－56）*T＝210
T = 15 hours
The total distance s between the express and the local trains is three times that between AB, so there is a difference
3*S＝15*（70+56）
The solution is s = 630km

The two trains leave from a and B at the same time. Car a travels 56 kilometers per hour and car B 64 kilometers per hour. After a period of time, the two trains are at the middle point
How many kilometers are there between a and B

If two cars meet in X hours, then
64x-56x=24×2
8x=48
x=6
So the distance between the two places is (64 + 56) × 6 = 720km
The distance between the two places is 720 kilometers

The two trains leave from two places, with a speed of 56 kilometers per hour and B speed of 64 kilometers per hour. After a period of time, the two trains meet at 24 kilometers from the midpoint. How many meters is the distance between them?

24÷【1/2-56/（56+64）】
=24÷【1/2-7/15】
=24÷1/30
=720km