Предмет: Алгебра, автор: vusal099

выполните действия 2а(3а-b+4) упростите выражение 6а(а-х+с)+6х(а+х-с)-6с(а-х-с) решите уравнение 5(х-3)=14-2(7-2х)

Ответы

Автор ответа: eliza123

2а(3а-b+4)=6a^2-2ab+8a

6a(a-x-c)+6x(a+x-c)-6c(a-x-c)=6a^2-6ax-6ac+6xa+6x^2-6xc-6ca+6cx-6c^2=6a^2+6x^2-6c^2-12ca

5(x-3)=14-2(7-2x)

5x-15=14-14+4x

5x-15=4х

х=15

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