human
Please explain how to solve equations like this one in step-by-step detail. Provide the solution for this problem and show each step as well..     

	• A train leaves City A and travels towards City B at a speed of 80 km/h. At the same time, another train leaves City B and travels towards City A at a speed of 100 km/h. If the cities are 600 kilometers apart, how long will it take for the two trains to meet?

gpt
--- Reasoning ---
1. Is the question multiple-choice question?
No
2. Is it implied multiple-choice question?
No
3. If two experts were independently asked the question, will the final answer be exactly the same?
Yes

--- Answer ---
grounded