Question

к новому учебному году школьная библиотека получила всего 510 учебников по математике и истории. учебников по математике было в 2 раза больше, чем по истории. сколько учебников по каждому предмету получила библиотека.

Answer 1

Представим что учебники по истории это х , тогда по математике х+2. Получим уравнение                                                                                                               
х+х2=510
х3=510
х=510:3
х=170(история)
170+170=340(математика)
Ответ.340 учебников по математике,170 по истории

Answer 2

2х+х=510
3х=510
х=170 учебников по истории
510-170=340 учебников по математике

Answer 3

Calculation of Textbooks in the Library

To determine the number of textbooks the library received for each subject, we can use the information provided. The library received a total of 510 textbooks, with twice as many textbooks on mathematics as on history.

Let's assume the number of history textbooks received is x. Since there were twice as many mathematics textbooks, the number of mathematics textbooks received would be 2x.

To find the values of x and 2x, we can set up an equation:

x + 2x = 510

Combining like terms:

3x = 510

Dividing both sides of the equation by 3:

x = 170

Therefore, the library received 170 history textbooks and 2 * 170 = 340 mathematics textbooks.

So, the library received 170 textbooks on history and 340 textbooks on mathematics.