Question

У брата и сестры вместе 120 карандашей.Сестра отдала брату 50 карандашей,и карандашей у них стало поровну.Сколько карандашей было у каждого из них сначала.

Answer 1

120:2+50=110карандашей у сестры 120-110=10карандашей у брата

Answer 2

У брата было 10, а у сестры 110, получается так

Answer 3

Problem Analysis

We are given that the brother and sister have a total of 120 pencils. The sister gives 50 pencils to the brother, and after that, they have an equal number of pencils. We need to determine how many pencils each of them had initially.

Solution

Let's assume that the brother initially had x pencils. Since the sister gave him 50 pencils, he now has x + 50 pencils.

We are also given that after the sister gave the brother 50 pencils, they had an equal number of pencils. This means that the sister also had x + 50 pencils initially.

According to the problem, the total number of pencils they had together was 120. So we can set up the following equation:

x + (x + 50) = 120

Simplifying the equation:

2x + 50 = 120

Subtracting 50 from both sides:

2x = 70

Dividing both sides by 2:

x = 35

Therefore, the brother initially had 35 pencils, and the sister initially had 35 + 50 = 85 pencils.

Answer

The brother initially had 35 pencils, and the sister initially had 85 pencils.