Question

как решить задачу: после того как на книжную полку поставили 20 книг и сняли в 2 раза больше чем поставили на полке отсталость 46 книг. сколько книг стояло на полке перовначально? решите точным уравнением плиииииз

Answer 1

х книг было

Х+20  книг стало после того, как поставили

х+20-20*2 книг стало после того, как сняли  

х+20-20*2 =46

х-20=46

х=66 книг стояло на полке перовначально

Answer 2

Пусть х книг стояло на полке первоначально, составим уравнение:

х+20-20*2=46

х+20-40=46

х-20=46

х=46+20

х=66

Ответ: 66 книг было на полке первоначально

Answer 3

Problem Analysis

To solve this problem, we need to determine the number of books that were initially on the bookshelf. We are given the following information: - 20 books were added to the bookshelf. - The number of books taken off the shelf was twice the number of books added. - The difference between the number of books taken off and the number of books added is 46.

Let's assume that the initial number of books on the bookshelf is x.

Solution

1. We know that 20 books were added to the bookshelf, so the total number of books on the bookshelf after the addition is x + 20. 2. The number of books taken off the shelf is twice the number of books added, which means it is equal to 2 * 20 = 40. 3. The difference between the number of books taken off and the number of books added is 46, so we can set up the following equation: 40 - 20 = 46. 4. Simplifying the equation, we have 20 = 46. 5. However, this equation is not possible because it leads to a contradiction. Therefore, there is no solution to this problem based on the given information.

Conclusion

Based on the given information, there is no solution to the problem of determining the initial number of books on the bookshelf. The equation derived from the information leads to a contradiction.