Question

В 1 книге в 3 раза меньше страницу, чем во 2. если увеличить количество страниц в 1 книге на 30, а во 2 уменьшить на 10, то страницу в 1 и 2 книге станет поровну. сколько страниц было в книгах первоначально

Answer 1

Пусть в 1 книге х стр, тогда во 2 книге 3х стр.
х+30 стало в 1  книге, 3х-10   стало во 2 книге
х+30=3х-10-3х
х-3х=-10-30
-2х=-40
х=(-40):(-2)
х=20 (стр) - в 1 книге
20*3=60(стр) - во 2 книге

Answer 2

Given Information

- The first book has three times fewer pages than the second book. - If the number of pages in the first book is increased by 30 and the number of pages in the second book is decreased by 10, then the number of pages in both books will be equal.

Solution

Let's denote the initial number of pages in the first book as x and the initial number of pages in the second book as 3x (since the first book has three times fewer pages than the second).

According to the given information, the following equation can be formed: 1. x + 30 = 3x - 10

Solving the Equation

Let's solve the equation to find the initial number of pages in each book.

1. x + 30 = 3x - 10 2. 30 + 10 = 3x - x 3. 40 = 2x 4. x = 20

So, the initial number of pages in the first book was 20 pages, and the initial number of pages in the second book was 60 pages.

Therefore, the first book initially had 20 pages, and the second book initially had 60 pages.

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