Question

Семь карандашей стоят дороже восьми тетрадей. Что дороже:восемь карандашей или девять тетрадей? Помогите пж. Даю 20 баллов!

Answer 1

Карандаши

допустим, что карандаш стоит на 1 руб дороже, тогда
Х- это тетрадь
Х+1 - карандаш
7(Х+1) = 8Х
Х=7 - тетрадь
7+1 = 8 - карандаш

7х 9 = 63 - тетради
8х8 = 64 - карандаши

Answer 2

Дороже 8 карандашей, потому, что
7 карандашей>8 тетрадей
Мы добавим ещё один карандаш и одну тетрадь, но карандаши будут стоить всё равно больше.

Answer 3

Answer:

To determine whether eight pencils or nine notebooks are more expensive, let's analyze the given information.

The statement says that seven pencils are more expensive than eight notebooks. This implies that the cost of one pencil is greater than the cost of one notebook.

Now, we need to compare the cost of eight pencils and the cost of nine notebooks. Since the cost of one pencil is greater than the cost of one notebook, it follows that the cost of eight pencils will be greater than the cost of eight notebooks. Additionally, since the cost of one pencil is greater than the cost of one notebook, the cost of nine pencils will also be greater than the cost of nine notebooks.

Therefore, eight pencils are more expensive than nine notebooks.

I hope this helps! Let me know if you have any further questions.