Question

Альбом для рисования и карандаш стоят 15 р. На все свои деньги Оля может купить 1 альбом или 4 карандаша . Сколько денег у Оли? Реши подбором.

Answer 1

РЕШЕНИЕ:
х - стоит альбом, у - карандаш, тогда 
х+у=15, х=4у 
4у+у=15, 5у=15, у=3, х=12, т. е у Оли в данный момент 12 рублей.
12 рублей стоит альбом 
3 рубля стоит карандаш 
У Оли 12 рублей

Answer 2

Solution:

To solve this problem, we can use a combination of the given prices for the drawing album and the pencils to determine the total amount of money Olga has.

Given: - The drawing album costs 15 rubles. - Olga can buy either 1 album or 4 pencils with all her money.

Let's consider the options for Olga's purchases:

1. If Olga buys 1 album: - The cost of the album is 15 rubles.

2. If Olga buys 4 pencils: - The cost of each pencil is 3 rubles (15 / 4 = 3).

Now, let's calculate the total amount of money Olga has by considering both options.

Calculation:

1. If Olga buys 1 album: - Olga has 15 rubles.

2. If Olga buys 4 pencils: - Olga has 12 rubles.

Conclusion:

Therefore, Olga has 15 rubles if she buys 1 album and 12 rubles if she buys 4 pencils.