Question

В 4-х коробках 21 карандаш. В 3-х коробках одинаковое количество карандашей. А в четвёртой коробке на 1 карандаш больше,чем в 3-х коробках. Сколько карандашей в каждой коробке?

Answer 1

21:3+1=8по восем карандашей

Answer 2

Problem Analysis

We have 4 boxes of pencils, with 21 pencils in total. In 3 of the boxes, there is an equal number of pencils. In the fourth box, there is one more pencil than in the other 3 boxes. We need to determine how many pencils are in each box.

Solution

Let's assume the number of pencils in each of the three boxes with the same number of pencils is x. The number of pencils in the fourth box will be x + 1.

The total number of pencils is given as 21. So we can set up the following equation:

3x + (x + 1) = 21

Simplifying the equation:

3x + x + 1 = 21

Combining like terms:

4x + 1 = 21

Subtracting 1 from both sides:

4x = 20

Dividing both sides by 4:

x = 5

Therefore, there are 5 pencils in each of the three boxes with the same number of pencils, and 6 pencils in the fourth box.

Answer

There are 5 pencils in each of the three boxes with the same number of pencils, and 6 pencils in the fourth box.