Question

В трёх классах 76 учеников .В первом классе учеников на 4 меньше чем во втором сколько учеников во втором классе если их на 2 ученика меньше чем в 3 классе

Answer 1

Во 2 классе - х учеников.
в 1 классе - х-4 учеников.
в 3 классе - х+2 учеников.
всего учеников 76, составляем уравнение.
х+х-4+х+2=76
3х=78
х=78:3
х=26 учеников во 2 классе

Answer 2

Calculating the Number of Students in Each Class

To solve this problem, we can use the information provided in the search results snippets to calculate the number of students in each class.

1. Given Information: - Total number of students in three classes: 76 - Number of students in the first class is 4 less than the number of students in the second class - Number of students in the second class is 2 less than the number of students in the third class

2. Calculations: - Let's denote the number of students in the first, second, and third classes as x, y, and z, respectively.

- From the given information, we can form the following equations: - x + y + z = 76 - x = y - 4 - y = z - 2 - Substituting the expressions for x and y from the second and third equations into the first equation, we can solve for the values of y and z.

3. Solving the Equations: - Using the given equations, we can solve for the values of y and z.

- Substitute y - 4 for x in the first equation: - (y - 4) + y + z = 76 - 2y + z - 4 = 76 - 2y + z = 80 - Substitute z - 2 for y in the first equation: - x + (z - 2) + z = 76 - x + 2z - 2 = 76 - x + 2z = 78 - Now we have a system of two equations: - 2y + z = 80 - x + 2z = 78

- Solving this system of equations will give us the values of y and z.

4. Solution: - Solving the system of equations, we find: - y = 29 - z = 31

- Therefore, the number of students in the second class is 29, and the number of students in the third class is 31.

Final Answer:

The number of students in the second class is 29, and the number of students in the third class is 31.