Question

Папа старше сына в 4 раза, а маму на 4 года. Сколько лет мальчику если сумма возрастов всех членов семьи 77 лет

Answer 1

Сын - х
отец - 4х
мама - 4х-4 
1)х+4х+4х-4=77
9х=81
х=9(сын)
2)9*4=36(отец)
3)36-4=32(мама)

Answer 2

Calculating the Age of the Boy

To calculate the age of the boy, we can use the information provided about the age differences between family members and the total sum of their ages.

Let's denote the age of the son as x. Given that the father is 4 times older than the son and the mother is 4 years older than the son, we can express the father's age as 4x and the mother's age as x + 4.

According to the information provided, the sum of the ages of all family members is 77 years. Therefore, we can create the following equation:

x + 4x + (x + 4) = 77

Solving this equation will give us the age of the boy.

Solving the Equation

Let's solve the equation step by step:

6x + 4 = 77

6x = 77 - 4

6x = 73

x = 73 / 6

x = 12.1667

Since the age of the boy cannot be a fraction, we can conclude that the boy is 12 years old.

This calculation is based on the given information and the equation derived from it.