Question

Сестра старше брата на 11 лет,а всместе им 27 лет. Сколько лет брату?ТОЛЬКО БЕЗ ИКСОВ!И желательно решение и краткая запись (15 баллов:333)

Answer 1

Вместе 27, 27-11=16 16:2=8 значит брату 8 а сестре 19

Answer 2

Сестра старше брата на 11 лет.
Сестре + брату = 27 лет.

x+11+x=27 (Не могу без иксов, уж простите)
2x=16
x=8
Брату 8 лет, а сестре 8+11 = 19 лет.

Answer 3

Problem Analysis

We are given that the sister is 11 years older than the brother, and their combined age is 27 years. We need to determine the age of the brother.

Solution

Let's assume the brother's age is x years. Since the sister is 11 years older, her age would be x + 11 years.

According to the given information, the combined age of the brother and sister is 27 years. So, we can write the equation:

x + (x + 11) = 27

Simplifying the equation:

2x + 11 = 27

Subtracting 11 from both sides:

2x = 16

Dividing both sides by 2:

x = 8

Therefore, the brother is 8 years old.

Answer

The brother is 8 years old.