Question

Решите с помощью уравнения задачу На первой остановке в пустой автобус вошли несколько человек 2 остановки вошли 10 человек Она 3 вышли 12 человек после чего в автобусе осталось 7 человек Сколько человек вошли в автобус На первой остановке

Answer 1

Х+10-12=17
х=17-10+12
х=19 (чел) вошли на первой остановке

Answer 2

Х+10-12=7
х=7+12-10
х=9
ответ 9 человек вошли на 1 остановки

Answer 3

Solving the Bus Problem

To solve the problem, we can use a system of linear equations. Let's denote the number of people who entered the bus at the first stop as x and the total number of people who entered the bus at the second stop as y.

At the first stop: - Number of people who entered the bus: x

At the second stop: - Number of people who entered the bus: y - Number of people who exited the bus: 3

Given information: 1. "On the first stop, several people entered the empty bus." 2. "At the second stop, 10 people entered." 3. "3 people exited the bus." 4. "After that, 7 people remained in the bus."

We can form the following equations based on the given information: 1. x + y = 10 (Total number of people who entered the bus at the second stop is 10) 2. x - 3 = 7 (After 3 people exited the bus, 7 people remained)

Solving the Equations

Let's solve the system of equations to find the values of x and y.

From the first equation: x = 10 - y

Substitute the value of x in the second equation: (10 - y) - 3 = 7 10 - y - 3 = 7 7 - y = 7 -y = 7 - 7 -y = 0 y = 0

Now, substitute the value of y back into the first equation: x + 0 = 10 x = 10

Conclusion

The number of people who entered the bus at the first stop is 10.