Question

2 пешехода идут навстречу друг другу. Один неизвестно, второй на 2 км. ч меньше. Через 3 часа они встретились расстояние между ними было 30 км. Составить и решить уравнение.

Answer 1

Пусть скорость I пешехода  х км/ч , тогда скорость
II пешехода (х-2) км/ч.
Скорость сближения при движении навстречу друг другу:
х  + (х - 2)  =  30  :  3 
х  + х  - 2  =  10
2х  - 2  = 10
2х = 10 + 2
2х = 12
х = 12 : 2
х = 6  (км/ч)  скорость I пешехода 
6 - 2 =  4 (км/ч) скорость II пешехода

Answer 2

#### Problem Statement Two pedestrians are walking towards each other. The first pedestrian's speed is unknown, while the second pedestrian is walking 2 km/h slower. After 3 hours, they meet, and the distance between them is 30 km. We need to set up and solve an equation to find the speed of the first pedestrian. #### Solution Let's denote the speed of the first pedestrian as **x** km/h. Since the second pedestrian is walking 2 km/h slower, their speed can be represented as **(x - 2)** km/h. We know that the distance traveled by an object is equal to its speed multiplied by the time taken. In this case, both pedestrians have been walking for 3 hours. The distance traveled by the first pedestrian is **3x** km, and the distance traveled by the second pedestrian is **3(x - 2)** km. When they meet, the total distance traveled by both pedestrians is equal to the distance between them, which is 30 km. Therefore, we can set up the equation: **3x + 3(x - 2) = 30** Simplifying the equation: **3x + 3x - 6 = 30** Combining like terms: **6x - 6 = 30** Adding 6 to both sides: **6x = 36** Dividing both sides by 6: **x = 6** Therefore, the speed of the first pedestrian is **6 km/h**. Please let me know if you need any further assistance!