Question

альбомы и краски вместе стоят 36 рублей,краски и блокноты-14 рублей,а альбомы и блокноты-28 рублей.сколько стоит каждый предмет?

Answer 1

Альбомы+Краски=36
Альбомы+Блакноты=28
Краски+Блакноты=14
2Альбома+2Красок+2Блакнота=78 рублей
Альбом+Краски+Блокнот=39 рублей
39-36=3 блокноты
39-28=11 краски
39-14=25 альбомы

Answer 2

Problem Analysis

We are given the following information: - The cost of albums and paints together is 36 rubles. - The cost of paints and notebooks is 14 rubles. - The cost of albums and notebooks is 28 rubles.

We need to find the cost of each item.

Solution

Let's assume the cost of albums is A rubles, the cost of paints is P rubles, and the cost of notebooks is N rubles.

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

1. A + P = 36 (equation 1) 2. P + N = 14 (equation 2) 3. A + N = 28 (equation 3)

To solve these equations, we can use a method called substitution. We can solve equation 1 for A and substitute it into equations 2 and 3.

From equation 1, we have A = 36 - P.

Substituting A = 36 - P into equations 2 and 3, we get:

36 - P + N = 28 (equation 4) 36 - P + P = 14 (equation 5)

Simplifying equations 4 and 5, we have:

N = 28 - 36 + P P = 14 - 36 + P

Simplifying further, we get:

N = -8 + P (equation 6) 0 = -22 + P (equation 7)

From equation 7, we can solve for P:

P = 22

Substituting P = 22 into equation 6, we can solve for N:

N = -8 + 22 N = 14

Finally, substituting P = 22 into equation 1, we can solve for A:

A = 36 - 22 A = 14

Therefore, the cost of albums is 14 rubles, the cost of paints is 22 rubles, and the cost of notebooks is 14 rubles.

Answer

The cost of each item is as follows: - Albums: 14 rubles - Paints: 22 rubles - Notebooks: 14 rubles