Предмет: Алгебра, автор: mini200219

Помогите решить
1)3x=9.
2) (2+x) - 4=24.
3) (x+7) = 2
¯¯¯ ¯¯¯
8 (x+9).
4) x² +4x+4=0.

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Автор ответа: Камилла272003
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