Question

Брат и сестра собирали марки. У них вместе на 20 марок больше,чем у брата , и на 12 марок больше чем у сестры. Сколько марок у каждого и сколько марок у них вместе? Задача на смекалку

Answer 1

У них вместе 32марки

20+12=32

У сестры -20марок

у брата -12марок

Answer 2

Problem Analysis

We are given that a brother and sister collected stamps. Together, they have 20 more stamps than the brother alone and 12 more stamps than the sister alone. We need to determine how many stamps each of them has and the total number of stamps they have together.

Solution

Let's assume the number of stamps the brother has is B and the number of stamps the sister has is S.

According to the problem, we have the following equations: 1. B + S = B + 20 (Together, they have 20 more stamps than the brother alone) 2. B + S = S + 12 (Together, they have 12 more stamps than the sister alone)

We can solve these equations to find the values of B and S.

Solving the Equations

Let's solve the equations using the substitution method.

From equation 1, we have B + S = B + 20. By subtracting B from both sides, we get S = 20.

Substituting S = 20 into equation 2, we have B + 20 = 20 + 12. By simplifying, we get B = 12.

Therefore, the brother has 12 stamps and the sister has 20 stamps.

Answer

The brother has 12 stamps and the sister has 20 stamps. Together, they have 32 stamps.