Question

За 2 тетради и ручку заплатили 6 руб 66 копеек, за тетрадь и две ручки 9 руб 93 коп сколько стоят отдельно тетрадь и ручка? 10 б + лучший ответ если верно :)​

Answer 1

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Answer 2

Calculation of the Cost of a Notebook and a Pen

To calculate the cost of a notebook and a pen separately, we can use the given information about the total cost of two notebooks and a pen and the total cost of a notebook and two pens.

Let's assign variables to the cost of a notebook and a pen: - Let x represent the cost of a notebook. - Let y represent the cost of a pen.

According to the given information: - 2 notebooks and 1 pen cost 6 rubles and 66 kopeks. - 1 notebook and 2 pens cost 9 rubles and 93 kopeks.

We can set up the following equations based on the given information:

Equation 1: 2x + y = 6.66 Equation 2: x + 2y = 9.93

To solve this system of equations, we can use substitution or elimination method. Let's use the elimination method:

Multiplying Equation 1 by 2, we get: 4x + 2y = 13.32

Subtracting Equation 2 from the above equation, we get: (4x + 2y) - (x + 2y) = 13.32 - 9.93 3x = 3.39 x = 1.13

Substituting the value of x into Equation 1, we get: 2(1.13) + y = 6.66 2.26 + y = 6.66 y = 6.66 - 2.26 y = 4.40

Therefore, the cost of a notebook is 1.13 rubles and the cost of a pen is 4.40 rubles.

Note: The given information does not provide the exact cost of a notebook and a pen, so the above calculations are based on the assumption that the given information is accurate.

Please note that the provided sources do not contain relevant information to cite for this specific calculation.