Question

. Мальчики пришли в кафетерий. Из них б заказали борщ, 4 - голубцы, 5 - пиццу. 2 борщ и голубцы. 2 - пиццу и голубцы. 2 борщ и пиццу. Сколько мальчиков пришло в кафетерий? помогите решить задачу!!​

Answer 1

Ответ:

6+4+5+2+2+2=21

Пошаговое объяснение:

Надо просто сложить всех хто что то покупал

Answer 2

Problem Analysis

We are given the following information: - Some boys came to a cafeteria. - They ordered borscht, 4 cabbage rolls (golubtsy), and 5 pizzas. - 2 boys ordered borscht and cabbage rolls. - 2 boys ordered pizza and cabbage rolls. - 2 boys ordered borscht and pizza.

We need to determine the number of boys who came to the cafeteria.

Solution

Let's assume the number of boys who came to the cafeteria is x.

From the given information, we can create the following equations:

1. The total number of borscht orders: x + 2 + 2 = b 2. The total number of cabbage roll orders: 4 + 2 + 2 = c 3. The total number of pizza orders: 5 + 2 + 2 = p

We can solve these equations to find the values of b, c, and p.

1. From equation 1, we have x + 4 = b. 2. From equation 2, we have c = 8. 3. From equation 3, we have p = 9.

Now, we can substitute the values of c and p into equation 1 to solve for x:

x + 4 = b

Substituting c = 8 and p = 9:

x + 4 = 8 + 9

Simplifying the equation:

x + 4 = 17

Subtracting 4 from both sides:

x = 13

Therefore, 13 boys came to the cafeteria.

Answer

The number of boys who came to the cafeteria is 13.