Question

Для школьной библиотеки закуплены атласы и 26 энциклопедией. Цена одной энциклопедии 309 руб. Атлас на 870 руб. дороже энциклопедии . Сколько закуплено атласов ,если по счету заплатили 13929 руб.?

Answer 1

309+870=1179 стоимость атласа
26Х309=8034 потрачено на энциклопедии
13929-8034=5895 остаток на атласы
5895:1179=5 атласов

Answer 2

Calculating the Number of Atlases Purchased

To calculate the number of atlases purchased, we can use the given information about the price of an encyclopedia and an atlas, as well as the total amount paid for the purchase.

First, let's calculate the number of encyclopedias purchased: - Price of one encyclopedia: 309 rubles - Total amount paid: 13929 rubles - Number of encyclopedias purchased = Total amount paid / Price of one encyclopedia

The number of encyclopedias purchased can be calculated as follows: ``` Number of encyclopedias purchased = 13929 / 309 ``` Let's calculate this.

Calculation

``` Number of encyclopedias purchased = 13929 / 309 = 45 ``` So, 45 encyclopedias were purchased.

Next, let's calculate the number of atlases purchased: - Price of one atlas: 870 rubles - Total amount paid: 13929 rubles - Number of atlases purchased = (Total amount paid - (Number of encyclopedias purchased * Price of one encyclopedia)) / Price of one atlas

The number of atlases purchased can be calculated using the formula: ``` Number of atlases purchased = (Total amount paid - (Number of encyclopedias purchased * Price of one encyclopedia)) / Price of one atlas ``` Let's calculate this.

Calculation

``` Number of atlases purchased = (13929 - (45 * 309)) / 870 Number of atlases purchased = (13929 - 13905) / 870 Number of atlases purchased = 24 / 870 ``` So, 24 atlases were purchased.

Therefore, if the total amount paid was 13929 rubles, the school library purchased 24 atlases.