Предмет: Математика, автор: dashatrusova26

ПОЖАЛУЙСТА СРОЧНО! Решите систему способом добавления
2х+у=10
6(х+1) - у=12

Ответы

Автор ответа: alangir35
1
2х+у=10
6(х+1)-у=12

2х+у=10
6х+6-у=12 умнаживаем 2х+у=10 на три тогда:

6х+3у=30
6х-у=6 минусуем их на дру друга:

4у=24
у=6
х=2
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: jk7717324
1. Necessary
2. Ability
3. caring
4. stоck-holding company
5. to put into operation
Ex.2. Розкрийте дужки, вживаючи дієслова в одному з граматичних часів:
1. It (to be ) impossible for her to feel at home.
2. I (to buy) a pair of gloves yesterday.
3. I've bought a typewriter, I (learn) to type.
4. The forecast says it (rain)
5. They (to play) football tomorrow.
Ex.3. Переробіть подані нижче речення з прямої мови в не пряму:
1. Boris told me, “I have already learned Spanish and am learning English now”.
2. "It will be very difficult to persuade her to take care of herself, doctor," I replied.
ПОМОГИТЕ ПОЖАЛУЙСТА,ДАЮ 20 БАЛОВ‼️‼️‼️‼️‼️‼️‼️‼️‼️
1 год назад
Предмет: Химия, автор: Аноним
Обчисліть валентності елементів у їх сполуках з Оксигеном: a) Ag20; 6) C120; B) Cr20s; г)MgO; Д) С0%; e) As20s
будь ласка ​
1 год назад
Предмет: Английский язык, автор: lexysash
Exercise 238. Transform the following complex sentences into simple ones using the Absolute Participle Complex.
A. Mode 1: As the weather was fine, we went for a walk- The weather being fine, we went for a walk.
1. As my friend lives far from here, I go to his place by bus.
2. As the play was very popular, it was difficult to get tickets.
3. As it is rather cold, I put on my coat.
4. As his mother teaches English, he knows the language very well.
5. As her son was ill, she could not go to the theatre.
B. Mode 1: As my brother had locked the door, I couldn't get into the room. My brother having locked the door, I couldn't get into the room.
1. As our teacher had visited India, we asked him to tell us about that country. 2. When the match had ended, the people went home. 3. As my friend had bought the tickets beforehand, we did not need to hurry. 4. After the sun had risen, we continued our way. 5. As his sister has broken his spectacles, he had to buy a pair of new ones. C. Mode 1: As the bridge was destroyed, we couldn't cross the river. The bridge being destroyed, we couldn't cross the river. 1. As all shops were closed, we couldn't buy anything. 2. As the road was being repaired, I couldn't go there by bus. 3. As the book was being printed, we hoped to get it soon. 4. As houses are built very quickly nowadays, we'll soon get a new flat. 5. As the waiting-room was being cleaned, the passengers were not let in.

D. M o d e 1: When the work had been done, they went home- The work having been done, they went home.

1. When the house had been built, we got a new flat. 2. As the key had been lost, she couldn't get into the room. 3. As the road had been repaired, we could go there by bus. 4. When the waiting-room had been cleaned, the passengers were let in. 5. As all the tickets had been sold out, we couldn't see the performance.
ДАЮ 70 БАЛІВ!!!​
1 год назад
Предмет: Обществознание, автор: petrik080808
Услугами каких отраслей мы пользуемся в жизни? Привести примеры!!!!!
7 лет назад
Предмет: Алгебра, автор: vynogradskaviktoriya
Абсциса точки перетину графіка функції у = х + 2 та у = 6 дорівнює :
7 лет назад