Предмет: Математика, автор: germanfro77

2 5/6x-3 3/4x-1 5/12= -1 5/9

Ответы

Автор ответа: azaliyayamaeva
0

Ответ:

5\33

Пошаговое объяснение:

17\6х - 15\4х-17\12=-14\9

-11\12х-17\12=-14\9

-33х-51=-56

-33х=-56+51

-33х=-5

х=5\33

Переводим в десятичную

х=0,15

Автор ответа: Grinday
0

Ответ:

5/33

Пошаговое объяснение:

Переводим правильные дроби в неправильные (целые значения умножаем на знаменатели дробей), получаем уравнение вида:

17/6*х - 15/4*х -17/12 = -14/9

Далее вычисляем разность первых двух дробей, для этого приводим их к общему знаменателю (находим находим наименьшее общее кратное для 6 и 4, то есть 12, что значит, что числитель первой дроби нужно умножить на 2, а числитель второй - на 3):

17х/6 - 15х/4 = 34х/12 - 45х/12 = -11х/12

Получаем уравнение вида:

-11х/12 - 17/12 = -14/9

После чего снова приводим дроби к общему знаменателю, то есть 36 (первую и вторую дроби умножаем на 3, третью - на 4). Получаем уравнение:

-33х - 51 = -56 (имеем право избавиться от знаменателя, так как у всех дробей он одинаков)

Переносим числа без неизвестного вправо, изменив знак:

-33х = -56 + 51 | -33х = -5

Чтобы найти х делим -5 на -33, минус на минус даёт плюс, а 5/33 даёт 5/33

Приложения:
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Exercise 1    
Tenses

Put
the verb in brackets in the correct tense. The tenses used are Present Simple,
Present Continuous, Past Perfect, and will. There are also examples of the
infinitive.

 



Example: Yesterday
I went (go) to London. I wanted to do some shopping.




Mrs Hay _________ (drive) along a small
country road when she _________ (see) a man at the side of the road. He
_________ (wave) and pointing at his car.

Mrs Hay _________ (stop) and _________ (ask) 
the man if he was all right.


"My car's broken down," said the
man.

"Where do you want _________ (go)?"
asked Mrs Hay.

"London,"
replied the man.


"Well, I _________ (not go) to London, but I _________
(give) you a lift to the station, if you like." On the way they chatted.


"_________ you _________ (work) in London?" asked Mrs
Hay.


"No, I don't. I _________ (run) my own
business in Oxford.
But today I _________ (have) lunch with a friend in London - we always _________ (have) lunch
together on Fridays. I promised _________ (meet) her at one o'clock."


"There's a train at 11.30. I don't think
you _________ (be) late for your appointment."

When they arrived at the station, a train
_________ (stand) at the platform.

"That's your train," said Mrs Hay.

"You _________ (catch) it if you're
quick."

After the man _________ (get out) of the car,

Mrs Hay _________ (drive away). A few minutes later she realised that she
_________ (make) a mistake: it was the wrong train. She went back to the
station, but the train wasn't there: it _________ already _________ (leave)!
She went into the station and asked at the information desk where the train was
going. "Edinburgh,"
the information clerk told her.


"Where does it stop?" asked Mrs
Hay.

"It's the express service," the
clerk told her.

"It doesn't stop until it gets to Edinburgh.”
Предмет: История, автор: KateDeli