12x - 11=8x+5

9-3x=2 (x+22)

2 (4x-6) = 5 (x+3)

0,3 (4x-1) + 2,3=1,1x-27

1) 12x - 11 = 8x + 5

12x - 8x = 5 + 11

4x = 16

x = 4

2) 9 - 3x = 2 (x+22)

9 - 3x = 2x + 44

2x + 3x = 9 - 44

5x = - 35

x = - 7

3) 2 (4x-6) = 5 (x+3)

8x-12 = 5x + 15

8x - 5x = 15 + 12

3x = 27

x = 9

4) 0.3 (4x-1) + 2.3=1.1x-27

1.2x-0.3+2.3=1.1x-27

1.2x-1.1x=-27+0.3-2.3

0.1x=-29

x=-290