Предмет: Алгебра, автор: Аноним

помогите срочно многр пблов даю

Приложения:

Zombynella: Контрольные нельзя здесь выкладывать, потом модераторы удаляют и ваши задания, и наши решения, баллы снимают.

nastya2222221: что за

nastya2222221: бред какой-то

Zombynella: Правила сайта почитайте. Я здесь 3 года, точно нельзя, так и пишут в уведомлении "согласно законодательства запрещено")

Ответы

Автор ответа: nastya2222221

1

1. а) 1/3x=12
x=12:1/3
x=36
б) 6x-10,2=0
6x=10,2
x=10,2:6
x=1,7
в)5x-4,5=3x+2,5
5x-3x=2,5+4,5
2x=7
x=7:2
x=3,5
г) 2x-(6x-5)=45
2x-6x+5=45
2x-6x=45-5
-4x=40
x=-10
2. пусть езда на автобусе будет x, тогда ходьба х+6
составим уравнение:
х+х+6=26
2х=26-6
2х=20
x=20:2
х=10

ответ: на автобусе Таня ехала 10 минут

3. сорян, сама не знаю

4. 7х-(х+3)=3(2х-1)
7х-х-3=6х-3
7х-х=6х
6х=6
х=6:6
х=1

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