Question

Помогите решить задачку: В школьный буфет привезли одинаковое количество бутербродов с колбасой и с сыром,всегона сумму 600р. Бутерброд с колбасой стоит 23р., бутерброд с сыром-7р. Сеолько стоили все бутерброды с колбасой?А сколько-все бутерброды с сыром?

Answer 1

23x+7x=600, x-количество бутербродов
x=20, следовательно 20*7=140- стоимость всех бутербродов с сыром, а 23*20=460- стоимость всех с колбасой

Answer 2

1)23+7=30(руб)-стоят 2 бутерброда вместе
2)600:30=20(бутер)
3)20*23=460(руб)-стоят все бутерброды с колбасой
4)20*7=140(руб)-стоят все бутерброды с сыром

Answer 3

Problem Analysis

In this problem, we are given that an equal number of sandwiches with sausage and sandwiches with cheese were brought to the school cafeteria. The total cost of all the sandwiches is 600 rubles. The sausage sandwich costs 23 rubles, and the cheese sandwich costs 7 rubles. We need to find the total cost of the sausage sandwiches and the total cost of the cheese sandwiches.

Solution

Let's assume that the number of sausage sandwiches and cheese sandwiches brought to the cafeteria is 'x'.

The total cost of the sausage sandwiches can be calculated by multiplying the cost of each sausage sandwich (23 rubles) by the number of sausage sandwiches ('x'):

Total cost of sausage sandwiches = 23 * x

Similarly, the total cost of the cheese sandwiches can be calculated by multiplying the cost of each cheese sandwich (7 rubles) by the number of cheese sandwiches ('x'):

Total cost of cheese sandwiches = 7 * x

Since the total cost of all the sandwiches is given as 600 rubles, we can write the following equation:

Total cost of sausage sandwiches + Total cost of cheese sandwiches = 600

Substituting the expressions for the total cost of sausage sandwiches and the total cost of cheese sandwiches, we get:

23 * x + 7 * x = 600

Simplifying the equation, we have:

30 * x = 600

Dividing both sides of the equation by 30, we find:

x = 20

Therefore, the number of sausage sandwiches and cheese sandwiches brought to the cafeteria is 20.

To find the total cost of the sausage sandwiches, we substitute the value of 'x' into the expression for the total cost of sausage sandwiches:

Total cost of sausage sandwiches = 23 * 20 = 460 rubles

To find the total cost of the cheese sandwiches, we substitute the value of 'x' into the expression for the total cost of cheese sandwiches:

Total cost of cheese sandwiches = 7 * 20 = 140 rubles

Answer

Therefore, all the sausage sandwiches cost 460 rubles, and all the cheese sandwiches cost 140 rubles.

Please let me know if you need any further assistance!