The distance between station a and station B is 300 km. An express train leaves from station a with a speed of 60 km / h, and a slow train leaves from station B with a speed of 60 km / h The distance between the two stations is 300 kilometers. An express train leaves from station a with a speed of 60 kilometers per hour, a slow train leaves from station B with a formal speed of 40 kilometers per hour. The slow train starts 30 minutes first. The two trains imagine how long it takes for the fast train to catch up with the slow train, how many kilometers it takes for the slow train at this time, and the equation

The distance between station a and station B is 300 km. An express train leaves from station a with a speed of 60 km / h, and a slow train leaves from station B with a speed of 60 km / h The distance between the two stations is 300 kilometers. An express train leaves from station a with a speed of 60 kilometers per hour, a slow train leaves from station B with a formal speed of 40 kilometers per hour. The slow train starts 30 minutes first. The two trains imagine how long it takes for the fast train to catch up with the slow train, how many kilometers it takes for the slow train at this time, and the equation

Suppose it takes x hours for the express to catch up with the local
60X-40(X+0.5)=300
The solution is: x = 16 hours
At this time, the distance of local train is: 60 × 16-300 = 660km

A. B is 300 km away from the two places. An express train leaves from station a at a speed of 60 km / h, and a local train leaves from place B at a speed of 60 km / h
The first 15 minutes of the express. The two trains are facing each other. How many hours will the express meet?
2. The two trains leave in the same direction at the same time, and the local train is ahead. How many hours after starting, do you catch up with the local train
3. The slow train starts for 30 minutes. The two trains are facing each other. The slow train is ahead. How long does it take for the express train to catch up with the slow train?
How many hours did the slow car go at this time?
A series of linear equations with one variable
A local train leaves from B at a speed of 40 km / h

A. The distance between B and B is 300 km. An express train leaves from a station at a speed of 60 km / h, and a slow train leaves from B station at a speed of 40 km / h. 1 the express train runs for 15 minutes first, and the two trains run in opposite directions. The express train runs for a few hours and then meets? 15 minutes = 1 / 4 hour (300-60 × 1 / 4) / (60 + 40) + 1 / 4 = 285 / 100 +