Предмет: Математика, автор: Аноним

При якому значенні х різниця виразів 3х
і 2(3х -1) дорівнює 2х + 7?

Ответы

Автор ответа: Svita14

1

3х и 2*(3х-1)

3х-2*(3х-1)=2х+7

3х-6х+2=2х+7

3х-6х-2х=7-2

-5х=5

х=5:(-5)

х= -1

Ответ: При х= -1

ПРОВЕРИМ

3*(-1)-2*(3*(-1)-1)=2*(-1)+7

5=5

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Окружающий мир, автор: 89271381657

как составить свою родословную

2 года назад

Предмет: Английский язык, автор: AllisonCipher

Рроллосовлалалвтаташулулвоси

2 года назад

Предмет: Русский язык, автор: DOOOFS

Составьте предложение с 10 фразеологизмами употребив их в роле обстоятельств

2 года назад

Предмет: Английский язык, автор: belsq

Дам 20 баллов, помогите

Put the verbs in brackets into the Past Indefiniteor the Past Continuous Tense.

I

1. We (sing) a song when George (come) into the room. 2. The house was quiet. The boys (play) chess and Mary (read) a book. 3. He (write) a letter when I (see) him. 4. Harry (do) his work while his brothers (play) games. 5. When you (see) him last? 6. My hat (flow) off when I (cross) the bridge. 7. Jack (do) his homework when his father (come) home from work. 8. Mary (wear) her new dress when I (meet) her yesterday. 9. The sick child (sleep) when the doctor (come). 10. I (read) the newspaper the whole evening yesterday. 11. It (rain) hard when I (go) out this morning. 12. Who (speak) over the telephone at five yesterday? The line (be) busy for an hour at least.

II

1.When I (go) out this morning, the sun (shine) and the birds (sing). It was a beautiful morning. I (walk) to the nearest park and sat down on the grass. But while I (sit) there, black clouds gathered and (hide) the sun. It (begin) to rain heavily, so I (run) home. My hat (fall) off as I (run).

2.Jack’s father (read) a book last night when he (hear) a noise in the garden. He (open) the window and looked out. It (be) a dark night and at first he could see nothing. But just as he (shut) his window, he (see) a man. The man (try) to climb over the garden wall. He was a thief. When he saw Jack’s father at the window, he (jump) off the wall and ran away. Jack’s father (run) after him. There was a car at the end of the street. The thief reached the car but just as he (get) into it, Jack’s father (catch) him.

3.Last Sunday one of my friends (celebrate) his birthday. When I (arrive), I (see) that his apartment (be) full of guests. I (enter) the sitting room. Some people (dance). Several guests (sing) a merry song and the hostess1 (play) the piano. A group of girls (listen) to music and other people (watch) the television. My friend (introduce) me to his guests when the hostess (invite) everybody to the table. The party ended late in the evening. I had a very good time there.

8 лет назад

Предмет: Математика, автор: MariaKol225

Пожалуйста помогите с этими заданиями, очень прошу, я вам подарю 60 баллов, очень прошу, помогите

8 лет назад