Question

Ученик купил за 37 рублей книгу тетрадь ручку карандаш, тетрадь ручка карандаш вместе стоят19 рублей,книга ручка и карандаш 35 рублей,тетрадь и ручка 5 рублей ,сколько стоит тетрадь?

Answer 1

37-35=2 рубля стоит тетрадь

Answer 2

1)37 - 35 = 2(руб) - ручка
2)2 + 5 = 7(руб)
Ответ: тетрадь стоит 7 рублей

Answer 3

Calculating the Cost of the Notebook

To calculate the cost of the notebook, we can use the given information about the prices of different combinations of items.

Let's denote: - Cost of the notebook as N - Cost of the pen as P - Cost of the pencil as C

We are given the following information: 1. The student bought a notebook, a notebook, a pen, and a pencil for 37 rubles. 2. The combined cost of a notebook, a pen, and a pencil is 19 rubles. 3. The combined cost of a book, a pen, and a pencil is 35 rubles. 4. The combined cost of a notebook and a pen is 5 rubles.

Using this information, we can set up a system of equations to solve for the individual costs.

Setting Up Equations

1. From the first piece of information, we have: - N + P + C = 37

2. From the second piece of information, we have: - N + P + C = 19

3. From the third piece of information, we have: - N + P + C = 35

4. From the fourth piece of information, we have: - N + P = 5

Solving the Equations

We can solve these equations to find the individual costs.

Subtracting the fourth equation from the third equation, we get: - (N + P + C) - (N + P) = 35 - 5 - C = 30

Substituting the value of C into the second equation, we get: - N + P + 30 = 19 - N + P = -11

Substituting the value of N + P from the fourth equation, we get: - 5 = -11 This equation does not yield a valid solution, and it seems there might be an error in the given information or the calculations.

Unfortunately, the given information seems to lead to a contradiction, as the equations do not yield a valid solution. It's possible that there might be a mistake in the provided information or the calculations. If you have any additional information or if there might be a typo in the given values, please feel free to provide it, and I'd be happy to help further.