найдите корни уравнении 1) - (2x + 1) = 1 - x 2) 1/2 (4x - 2) = - 7 3) 5/6x + 3 = 1/6x 4) 3(x + 6) = 2(x - 3) ПОМОГИТЕ ПЛИЗ ДАЮ 20 БАЛЛОВ

1) - (2х + 1) = 1 - х

- 2х - 1 = 1 - х

- 2х + х = 1 + 1

- х = 2

- - - - - - - - - - - -

2) 1/2(4х - 2) = - 7

2х - 1 = - 7

2х = - 7 + 1

2х = - 6

х = - 6 : 2

- - - - - - - - - - - -

3) 5/6х + 3 = 1/6х

5/6х - 1/6х = - 3

4/6х = - 3

2/3х = - 3

х = - 3 : 2/3

х = - 3 · 3/2

х = - 9/2

- - - - - - - - - - - -

4) 3(х + 6) = 2(х - 3)

3х + 18 = 2х - 6

3х - 2х = - 6 - 18