Предмет: Математика, автор: андрей3100

помогите решить уровнение!
3(а+2)-15=7(3-а)

Ответы

Автор ответа: Ринанас

1

3а+6-15 = 21-7а
3а+7а = 21-6+15
10а = 30
а = 30/10
а = 3

андрей3100: спосибо большое

Ринанас: Пожалуйста.

Автор ответа: Kiska2000

2

Это же просто :)
3(а+2)-15=7(3-а)
3a+6-15=21-7a
3a+7a=21-6+15
10a=30
a=3

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: mooncat1

Помогите!!!!!!плизззз

1 год назад

Предмет: Английский язык, автор: Arinka1111111111

complete the sentences with the correct form on the word in brackets.
1. The popular ... took part in the concert yesterday. (sing)
2. Paula wants to become an English ... . (teach)
3. Ivan Pavlov is a world-famous ... . (science)
4. This club is only for famous ... of our contry. (travel)
5. I think you will be a successful ... in the future. (write).

EXAMPLE: Denis is the best swimMER in our school. (swim)

1 год назад

Предмет: Английский язык, автор: lol1046

Помогите пожалуйста, 5 класс

1 год назад

Предмет: Английский язык, автор: milakiosse2001

1) I do sports at the gym/at a shop.
2) We ate ice cream at the museum/at the café.
3) My friends are roller-skating at school/in the park.
4) We have English, Math, Russian at school/in the garden.
5) My grandmother watered flowers at the market/in the garden
Помогите выбрать правильный вариант

7 лет назад

Предмет: Английский язык, автор: BitesTheDust

Помогите сколько сможете, пожалуйста.

1. Составьте из слов предложения
1. his, the, bank, has, He, invested, in, money, although, good, the, interest,
very, isn't
2. increase, to, We, right, the, must, attract, the, salary, applicants
3. received, with, We, happy, are, not, goods, we
4. pumps, for, twenty, Our, has, supplying, been, almost, years, company
5. another, to, look, We, for, have, supplier

2.Rewrite the sentences in the passive.
1. They have just adopted the annual budget.
The annual budget........by them.
a) has just been adopted b) was just adopted
2. My assistant sent you the invoice last Monday.
The invoice........ to you by my assistant last Monday.
a) is sent b) was sent
3. We are changing the organizational structure of
our company.
The organizational structure of our company.......now.
a) is changing b) is being changed
4. We will employ several workers. Several
workers ........by us.
a) will be employed b) will employ
5. Kerrie has paid the bill. The bill ......... by
Kerrie.
a) was paid b) has been paid

7 лет назад