Odpowiedź:
a) 4x - 7 = 2x + 9
4x - 2x = 9 +7
2 x = 16
x = 8
b) 3 - 8x = 18 - 3x
- 8x + 3x = 18 - 3
- 5x = 15
x = -3
c) 2 - x = 12 +7x
- x - 7x = 12 - 2
- 8x = 10
x = -10/8
x = -1 2/8
x = - 1 1/4
d) 3x + 5x - 6 = 6x + 2
8x - 6x = 2 + 6
2x = 8
x = 4
e) 5 - 9x + 6 = 2x + 14 - x
11 - 9x = x + 14
- 9x - x = 14 - 11
- 10x = 3
x = -3/10
