не могу решить уравнения,заранее 2x =8
6x -5x = 10
4x +7 = 15
9x - 5 = 3x + 7
5x + 3 = -3x + 19

2x = 8

x = 8 : 2

x = 4

6x - 5x = 10

x = 10

4x + 7 = 15

4x = 15 - 7

4x = 8

x = 8 : 4

x = 2

9x - 5 = 3x + 7

9x - 3x = 7 + 5

6x = 12

x = 12 : 6

x = 2

5x + 3 = -3x + 19

5x + 3x = 19 - 3

8x = 16

x = 16 : 8

x = 2