Question

Отцу Сергея 45 лет. Сергей в 3 раза моложе своего отца. Сколько лет было отцу ,когда родился Сергей?

Answer 1

1) 45 : 3 = 15 лет - возраст Сергея

2) 45 - 15 = 30 лет - возраст отца, когда родился Сергей.

Ответ: отцу было 30 лет, когда родился Сергей.

Answer 2

Calculation of Father's Age

To determine the age of Sergey's father when Sergey was born, we need to use the information provided. Sergey is currently 45 years old, and he is three times younger than his father.

Let's denote Sergey's age as S and his father's age as F. We can set up the following equation based on the given information:

S = 3F

Since Sergey is currently 45 years old, we can substitute S with 45 in the equation:

45 = 3F

Now, we can solve for F to find Sergey's father's age when Sergey was born.

Dividing both sides of the equation by 3:

F = 45 / 3

Simplifying the equation:

F = 15

Therefore, Sergey's father was 15 years old when Sergey