Предмет: Алгебра, автор: Аноним

Помоните сделать с 8 по 12

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Ответы

Автор ответа: русская25

№8

1-б)

2-в)

3-а)

№9

4х-8+10х=20

14х=28

х=2

№10

-х+4у=-25

3х-2у=30

-3х+12у=-75

3х=2у=30

х=7

у=- 4,5

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