Question

Через 7 лет Коля будет вдвое старше, чем сейчас. Сколько лет было Коле 5 лет назад?

Answer 1

1)7*2=14(лет)
2)14-5=9(лет)
Ответ: 9 лет было Коле 5 лет назад

Answer 2

Problem Analysis

We are given that in 7 years, Kolya will be twice as old as he is now. We need to determine Kolya's age 5 years ago.

Solution

Let's assume Kolya's current age is x. According to the given information, in 7 years, Kolya will be twice as old as he is now. This can be represented as:

x + 7 = 2x

Simplifying the equation, we find:

x = 7

Therefore, Kolya's current age is 7 years.

To find Kolya's age 5 years ago, we subtract 5 from his current age:

7 - 5 = 2

Therefore, Kolya was 2 years old 5 years ago.

Answer

Kolya was 2 years old 5 years ago.

Explanation

Given that in 7 years, Kolya will be twice as old as he is now, we can set up the equation x + 7 = 2x, where x represents Kolya's current age. Solving this equation, we find that Kolya's current age is 7 years. Subtracting 5 from his current age, we determine that Kolya was 2 years old 5 years ago.