Предмет: Математика, автор: arinapvrn

-3 (3b + 1) -12 = 12

Ответы

Автор ответа: Svita14

1

-3*(3b + 1) -12 = 12

-9b-3-12=12

-9b= 12+12+3

-9b= 27

b= 27: (-9)

b= -3

Ответ: b= -3

ПРОВЕРКА

-3*(3*(-3)+1)-12=12

12=12

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