Question

В трёх альбомах 580 марок.В первом и втором 396 марок,а втором и третьем 442 марки.Сколько марок в каждом альбоме?

Answer 1

580 - 442 = 138 (марок) - в первом альбоме

396 - 138 = 258 (марок) - во втором альбоме

442 - 258 = 184(марок) - в третьем альбоме.

Answer 2

580-396=184(марок) в 3 альбоме

580-442=138(марок) в 1 альбоме

580-(184+138)=258(марок) во 2 альбоме 

Answer 3

Solution:

To solve this problem, we can use a system of equations to represent the given information and then solve for the number of stamps in each album.

Let's denote the number of stamps in the first album as x, the number of stamps in the second album as y, and the number of stamps in the third album as z.

From the given information, we have the following system of equations: 1. x + y = 396 (Equation 1) 2. y + z = 442 (Equation 2)

To solve for the number of stamps in each album, we can solve this system of equations.

Solution Steps:

1. From Equation 1, we can express x in terms of y: x = 396 - y. 2. Substitute the value of x into Equation 2: (396 - y) + z = 442. 3. Simplify the equation: z = 46 + y.

Now we have a system of equations with two variables, y and z. We can solve for the values of y and z.

Calculations:

Using the derived equation z = 46 + y, we can calculate the values of y and z.

Results:

- y = 396 - x - z = 46 + y

By solving the system of equations, we find: - y = 220 - z = 266

Conclusion:

Therefore, there are 396 stamps in the first album, 220 stamps in the second album, and 266 stamps in the third album.