Two cars a and B are going from a and B to each other at different speeds. They meet on the way, and the meeting place is 70km away from A. after meeting, the two cars continue to advance at the original speed, return immediately after reaching the destination, and meet again on the way. At this time, the meeting place is 50km away from A. It is known that the time from the first meeting to the second meeting is 4 hours, so the speed of two cars AB is calculated Who's going to help you list the equations

Two cars a and B are going from a and B to each other at different speeds. They meet on the way, and the meeting place is 70km away from A. after meeting, the two cars continue to advance at the original speed, return immediately after reaching the destination, and meet again on the way. At this time, the meeting place is 50km away from A. It is known that the time from the first meeting to the second meeting is 4 hours, so the speed of two cars AB is calculated Who's going to help you list the equations

The time from the first meeting to the second meeting is four hours
The first time we met was 4 (3-1) = 2 hours
Vehicle a speed 70 △ 2 = 35 km / h
Distance between a and B (70x3 + 50) △ 2 = 130km
Vehicle B speed (130-70) △ 2 = 30 km / h