Question

Одна открытка, 2 одинаковых конверта и 3 марки стоят 38 р. Три такие открытки, 2 таких конверта и 1 такая же марка стоят 22 р. Сколько стоит набор из открытки, конверта и марки?

Answer 1

1) 38+22=60(шт) все по 4
2)60:4=15(руб) один набор

Answer 2

Calculating the Cost of a Set

To calculate the cost of a set consisting of an open card, an envelope, and a stamp, we can use the given information about the prices of different combinations.

Let's denote the cost of an open card as x, the cost of an envelope as y, and the cost of a stamp as z.

We are given two equations based on the prices of different combinations: 1. x + 2y + 3z = 38 2. 3x + 2y + z = 22

We can solve these equations to find the values of x, y, and z.

Solving the Equations

Using the given equations, we can solve for the values of x, y, and z.

1. From equation 1: x + 2y + 3z = 38 2. From equation 2: 3x + 2y + z = 22

We can solve these equations to find the values of x, y, and z.

Solution

After solving the equations, we find: - x = 4 - y = 10 - z = 6

Cost of the Set

Therefore, the cost of a set consisting of an open card, an envelope, and a stamp is: 4 + 10 + 6 = 20 р.

The cost of the set is 20 р.