Question

Для оклеивания комнаты и коридора купили 25 рулонов обоев. Сколько рулонов пойдёт на оклеивания стен в комнате, если для неё нужно в 4 раза больше чем для коридора.плизз с действиями и объяснениями

Answer 1

Для коридора нужно х рулонов. для комнаты в 4 раза больше, то есть 4х. х+4х=25.
5х=25. х=25:5=5(рулонов для коридора). для комнаты в 4 раза больше, то есть 5*4=20 рулонов

Answer 2

Calculating the Number of Wallpaper Rolls Needed

To calculate the number of wallpaper rolls needed for the room and the corridor, we can use the fact that the room requires 4 times more wallpaper than the corridor.

Let's denote: - The number of rolls needed for the corridor as C - The number of rolls needed for the room as R

Given that 25 rolls of wallpaper were purchased, we can express the relationship between the rolls needed for the room and the corridor as: R = 4C

To find the specific values for R and C, we can use the following steps:

1. Establishing the Relationship - We know that the total number of rolls purchased is 25: R + C = 25

2. Substituting the Relationship - Since R = 4C, we can substitute this into the previous equation: 4C + C = 25

3. Solving for C - Combining like terms: 5C = 25 - Solving for C: C = 25 / 5 = 5

4. Finding R - Using the relationship R = 4C: R = 4 * 5 = 20

Conclusion

Based on the calculations, 20 rolls of wallpaper will be needed for the room, and 5 rolls will be needed for the corridor.