The distance between the two places is 455km. A and B cars drive from the two places at the same time. After 3.5 hours, they meet. A car is 68km. B car how many kilometers per hour To set up equations, write equivalent relations

The distance between the two places is 455km. A and B cars drive from the two places at the same time. After 3.5 hours, they meet. A car is 68km. B car how many kilometers per hour To set up equations, write equivalent relations

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Set car B to travel x kilometers per hour
The distance of a vehicle + the distance of B vehicle = the total distance
3.5×68+3.5X=455
238+3.5X＝455
3.5X＝217
X＝62
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The distance from Beijing to Nanjing is 1170 km. When a bus leaves Beijing, it will travel 85 km per hour. When a car leaves Nanjing, it will travel 110 km per hour
(1) How many hours will the two cars meet each other?
(2) The bus leaves for 24 minutes first, and the two cars are facing each other. How many hours has the car been driving before the two cars meet (the result remains double digits)?

1170 ÷ (85 + 110) = 6 hours
24 minutes = 0.4 hours
(1170-85x0.4) / (85 + 110) ≈ 5.83 hours

The distance from Beijing to Nanjing is 1170 km. The bus runs 85 km per hour from Beijing, and the car runs 110 km per hour from Nanjing. Q: (1) the two cars leave at the same time and face each other. How many hours later do they meet? (2) the bus runs for 24 minutes and the two cars face each other. How many hours do the two cars meet (accurate to the percentile)?

(1) 1170 divided by (85 + 110) = 6 hours
(2) (1170-85 times 24 divided by 60) divided by (85 + 110) = 5.83 hours

It takes 9 hours for a car to travel from place a to place B, 100 kilometers per hour to go and 80 kilometers per hour to return. How many kilometers are there between the two places?

Suppose the time to go is x and the time to come back is y. 100x = 80y x + y = 9
So x is 4 and Y is 5
So the distance between the two places is 400 kilometers