Пошаговое объяснение:

1.

3(x - 2) = x + 2

3x - 6 = x + 2

2x = 8

x = 4

2.

5 - 2(x - 1) = 4 - x

5 - 2x + 2 = 4 - x

7 - 2x = 4 - x

-x = -3

x = 3

3.

(7x + 1) - (9x + 3) = 5

7x + 1 - 9x - 3 = 5

-2x -2 = 5

-2x = 7

x = -3.5

4.

3.4 + 2y = 7(y - 2.3)

3.4 + 2y = 7y - 16.1

-5y = -19.5

y = 3.9

5.

0.2(7 - 2y) = 2.3 - 0.3(y - 6)

1.4 - 0.4y = 2.3 - 0.3y + 1.8

-0.1y = 2.7

y = -27

6.

2/3(1/3x - 1/2) = 4x + 2 + 1/2

2/9x - 1/3 = 4x + 2 + 1/2

(-3 - 7/9)x = 2 + 5/6

-34/9x = 17/6

-68/18x = 51/18

x = -3/4