Question

Три математика ехали в разных вагонах одного поезда. Когда поезд подъезжал к станции, математики насчитали на перроне 7, 12 и 15 скамеек. А когда поезд отъезжал, один из них насчитал еще 2 скамейки. Сколько насчитали остальные?

Answer 1

7+2<15
12+2<15
Значит,вариант единственный скамеек было: 15+2=17 ,знаит другие насчитали 10 и 5

Answer 2

Сложил все вместе и у тебя получится ответ на твой вопрос

Answer 3

Problem Analysis

Three mathematicians are traveling in different train cars. When the train arrived at the station, they counted 7, 12, and 15 benches on the platform. However, when the train departed, one of the mathematicians counted 2 more benches. We need to determine how many benches the other mathematicians counted.

Solution

Let's assume the number of benches counted by the mathematicians are represented by variables `x`, `y`, and `z`. According to the problem, we have the following equations:

Equation 1: `x + y + z = 7` (the total number of benches counted when the train arrived) Equation 2: `x + y + z + 2 = 12` (the total number of benches counted when the train departed)

To find the values of `x`, `y`, and `z`, we can solve these equations simultaneously.

Subtracting Equation 1 from Equation 2, we get: `(x + y + z + 2) - (x + y + z) = 12 - 7` Simplifying, we have: `2 = 5`

This is not a valid equation, which means there is no solution to the problem. The given information is contradictory.

Conclusion

Based on the given information, it is not possible to determine how many benches the other mathematicians counted. The problem contains contradictory information, leading to an invalid equation.