Question

Решите задачу по действиям Календарь дороже общей тетради в 2 раза , а вместе они стоят 36 рублей . Сколько стоит календарь?

Answer 1

Пусть тетрадь стоит Х рублей, тогда календарь-2Х рублей. 2Х+Х=36
Отсюда Х=12, календарь стоит 24 рубля

Answer 2

Calculating the Cost of the Calendar

To solve the problem, we can set up a system of equations based on the given information. Let's denote the cost of the calendar as C and the cost of the notebook as N. We are given two pieces of information: 1. The calendar is twice as expensive as the notebook: C = 2N 2. The total cost of both items is 36 rubles: C + N = 36

Solution

We can use the first equation to express C in terms of N: C = 2N

Now, we can substitute this expression for C into the second equation: 2N + N = 36 3N = 36 N = 12

So, the cost of the notebook is 12 rubles.

Now, we can find the cost of the calendar using the first equation: C = 2 * 12 C = 24

Answer

Therefore, the cost of the calendar is 24 rubles.