Question

Сестра старше брата в 1 целую 1/3 раза а брат младше на 7 лет.Сколько лет сестре и брату?

Answer 1

сестре х+7 лет.
Составим уравнение (х+7):х=1 1\3. 
3(х+7)-4х=0 
3х+21-4х=0 
х=21. Брату 21 год. 
21+7=28 лет. Сестре 28 лет.

Answer 2

Calculating the Ages of the Sister and Brother

To calculate the ages of the sister and brother, we can use the information provided in the question. Let's break it down step by step.

1. Define the Variables: - Let's assume the brother's age is represented by B and the sister's age is represented by S.

2. Given Information: - The sister is older than the brother by 1 whole and 1/3 times. - The brother is younger than the sister by 7 years.

3. Formulate Equations: - We can represent the given information in the form of equations to solve for the ages of the sister and brother.

- Equation 1: S = B + 1 1/3 (The sister is older than the brother by 1 whole and 1/3 times) - Equation 2: S = B + 7 (The brother is younger than the sister by 7 years)

4. Solving the Equations: - We can use these equations to solve for the ages of the sister and brother.

- From Equation 1: S = B + 1 1/3 - From Equation 2: S = B + 7

- Equating the two expressions for S: - B + 1 1/3 = B + 7 - 1 1/3 = 7 - This equation does not have a valid solution, as 1 1/3 is not equal to 7.

Conclusion:

Given the information provided, it seems there might be a mistake in the given data or equations. The current information does not lead to a valid solution for the ages of the sister and brother. If there are any additional details or corrections to the given information, please feel free to provide them for further analysis.