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3 x - 2 = x + 6

3 x - x = 6 + 2

2 x = 8

x = 8/2 = 4

7 - 2 x = x - 14

- 2 x - x = - 14 - 7

- 3 x = - 21

x = 7

2 x + 3 x - 8 = 5 x + 3 x + 1

5 x - 5 x - 3 x = 1 + 8

- 3 x = 9

x = - 3

6 x + 18 = 12 - 3 x

6 x + 3 x = 12 - 18

9 x  = - 6

x = - 6/9 = - 2 /3

x + 4 = 3 x - 6

x - 3 x = - 6 - 4

- 2 x = - 10

x = 5

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