Zad. 3
a)
x = 3 | · 2
2x = 6 | + 3
2x + 3 = 9 | - 5x
- 3x + 3 = 9 - 5x | + 1
- 3x + 4 = 10 - 5x | · 2
- 6x + 8 = 20 - 10x
b)
x = - 1 | + 4x
5x = 4x - 1 | - 3
5x - 3 = 4x - 4 | + 2
5x - 1 = 4x - 2 | · (- 1)
- 5x + 1 = - 4x + 2 | + 4
- 5x + 5 = - 4x + 6