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Ответ

Автор - Доравских
(3х+9)(6х+20х-3+3+6х+18)=0
(3х+9)(32х+18)=0
3х+9=0 или 32х+18=0
3х=-9 х1=-3
32х+18=0 32х=-18 х= -0,56
Ответ : -3 ; -0.56

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