Odpowiedź:
3(1 - x/3) = 5x - 1/9
3 - x = 5x - 1/9
- x - 5x = - 3 - 1/9
- 6x = - 3 1/9
6x = 3 1/9
x = 3 1/9 : 3 = 28/9 * 1/3 = 28/27 = 1 1/27
