Question

Помогите с уравнениями:

1) 7x-3=4x-18

2) 16-4x=22-2x

3) 3x+9=7x+25

4) 3x-19=2x-6

Answer 1

1) 7х - 3 = 4х - 18

7х - 4х = 3 - 18

3х = - 15

х = - 15 : 3

х = - 5

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

2) 16 - 4х = 22 - 2х

- 4х + 2х = 22 - 16

- 2х = 6

х = 6 : (-2)

х = - 3

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

3) 3х + 9 = 7х + 25

3х - 7х = 25 - 9

- 4х = 16

х = 16 : (-4)

х = - 4

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

4) 3х - 19 = 2х - 6

3х - 2х = 19 - 6

х = 13