Question

Задача (168) Для ремонта коридора и комнаты купили 25 рулонов обоев. Сколько рулонов пойдёт на оклеивание стен в комнате, если для неё нужно в 4 раза больше обоев,чем для коридора?

Answer 1

коридор - х рул.,

комната - 4х рул.,

всего - 25 рул.,

х + 4х = 25,

5х = 25,

х = 5 рул. - для коридора,

4х = 4*5 = 20 рул. - для комнаты

Answer 2

cоставь уравнение (4х+х=25) (5х=25) (х=5)

Answer 3

Problem Analysis

To solve this problem, we need to determine the number of wallpaper rolls required to cover the walls of both the corridor and the room. We are given that 25 rolls of wallpaper were purchased, and we need to find out how many rolls will be needed for the room, considering that the room requires four times more wallpaper than the corridor.

Solution

Let's assume that the number of rolls required for the corridor is x. According to the problem, the room requires four times more wallpaper than the corridor. Therefore, the number of rolls required for the room will be 4x.

We know that the total number of rolls purchased is 25. So, we can set up the following equation:

x + 4x = 25

Simplifying the equation, we get:

5x = 25

Dividing both sides of the equation by 5, we find:

x = 5

Therefore, the number of rolls required for the corridor is 5, and the number of rolls required for the room is 4 times that, which is 20.

Answer

To cover the walls in the room, 20 rolls of wallpaper will be needed.

Explanation

The problem states that 25 rolls of wallpaper were purchased for the corridor and room. It also mentions that the room requires four times more wallpaper than the corridor. By setting up an equation and solving it, we find that the corridor requires 5 rolls of wallpaper and the room requires 20 rolls. This means that 20 rolls of wallpaper will be needed to cover the walls in the room.