Предмет: Алгебра, автор: iliasergeevich1505

Помогите, срочно итоговый тест

Приложения:

Ответы

Автор ответа: taisaivanivnamatviyc
1

Відповідь:

1)в

2)б

3)г

4)г

Пояснення:

6)відкриваємо дужки (перемножуєм вирази в дужках)

зводимо подібні

-10х-8=32

-10х=32+8

-10х=40

х=-4.

7) додаємо рівняння між собою

9х=90,х=10

підставляємо в друге рівняння

4*10-3у=58

40-3у=58

-3у=58-40

-3у=18, -у=6, у=-6.

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