Question

С помощью уравнения решите задачу. Один брат старше второго на 5 лет.Суммарный возраст равен 17 годам.Сколько лет братьям?

Answer 1

Х - возраст одного брата
х+5 - возраст второго брата

составим и решим уравнение
х+ х+5 = 17
2х+5=17
2х= 17-5
2х= 12
х= 12:2
х=6   (лет) - возраст первого брата

х+5 = 6+5 = 11 (лет) - возраст второго брата

проверка 6+11= 17 лет - суммарный возраст братьев

Answer 2

Solution:

Let's denote the age of the younger brother as x. According to the given information, the older brother is 5 years older than the younger brother, so the age of the older brother can be represented as x + 5. The sum of their ages is 17 years.

We can express this information in the form of an equation: x + (x + 5) = 17

Solving for x will give us the age of the younger brother, and then we can find the age of the older brother by adding 5 to it.

Calculation:

x + (x + 5) = 17 2x + 5 = 17 2x = 17 - 5 2x = 12 x = 12 / 2 x = 6

So, the younger brother is 6 years old. The older brother is 6 + 5 = 11 years old.

Therefore, the younger brother is 6 years old, and the older brother is 11 years old.