Предмет: Алгебра, автор: vavila131008

Вычисли корень уравнения:

1,3−10+(−7,9k)=9+1,3−9,9k

Ответы

Автор ответа: igortochnonefake
1

Переносим -7,9k в правую сторону со сменой знака. Аналогично поступаем с 1,3. Получается

-10=9+1,3-1,3-9,9k+7,9k

1,3-1,3=0

-9,9k+7,9k=-2k

Получаем:

-10=9-2k

переносим -2k меняя знак, переносим -10 также меняя знак

2k=9+10

k=19/2

k=9,5

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: nazerkerlankyzy
1. We _______ see the lake from our bedroom window.

are able
can
must
might

2. — _______ you speak any foreign languages?

could
can
must
might

3. I am afraid I _______ come to the party next week.

could not
cannot
must not
might not

4. When we went to the forest, we _______ smell burning.

could
can
must
might

5. She spoke in a very low voice, but I _______ understand what she said.

could
can
must
might

6. I do not know when they will be here. They _______ arrive at any time.

could
can
must
might

7. I was so tired. I _______ sleep for a week.

could
can
must
might

8. We _______ have gone away if we had enough money.

could
can
must
might

9. You have been travelling all day. You _______ be tired.

could
must to
must
might

10. They have not lived here for very long. They _______ , know many people.

could
should
must not
might

11. The phone rang but I did not hear it. I _______ have been asleep.

could
may
must
might

12. She passed me without speaking. She _______ have seen me.

could not
cannot
should
might not

13. — Why did not your sister answer the phone?
— She _______ have been asleep.

can
should
must
might'nt

14. — Why did Sarah miss meeting?
— She _______ have known about it.

should not
should
must
might not

15. Do not phone me at eight o'clock. I _______ be watching the football match on TV.

could not
can
should
might

16. — What time are you going?
— Well, I am ready, so I _______ go now.

could as well
can as well
must as well
might as well

17. She is a very nice person. You _______ meet her.

can
are able
must
have

18. I have not phoned Ann for ages. I _______ phone her tonight.

could
can
must
have

19. He cannot come out with us this evening. He _______ to work.

could
has
must
might

20. I _______ get up early tomorrow, because my train leaves at 7:30.

need
have to
must
might

21. We do not have much time. We _______ hurry.

should to
have
must
might to

22. When we are in the library, we _______ not make any noise.

could
can
must
might

23. You can come with me if you like but you _______ come if you do not want.

could not
do not have
must not
might

24. She has been studying hard for the exam, so she _______ pass it.

could
should
must
might

25. It was a great party last night. You _______ have come.

could
should
must
might
1 год назад
Предмет: Русский язык, автор: Богдик12345
Пожалуйста помогите по русскому языку сделать задачу!!!
Назови пять дней, не употребляя чисел и названий дней недели
ПРОВЕРЬ СЕБЯ: В ОТВЕТЕ БУДУТ ТОЛЬКО НАРЕЧИЯ
1 год назад
Предмет: Русский язык, автор: алиев3
проверичное слово околдовала
1 год назад
Предмет: История, автор: Zhans06
Пж срочно 2мин осталось
7 лет назад
Предмет: Геометрия, автор: Назмие
Если у меня 2 по физике во втором полугодии а в первом полугодии была три три паставит в году в 10 классе
7 лет назад