Zadanie
a)
4x - x + 8 = 2
3x + 8 = 2 l -8
3x = -6 l :3
x = -2
b)
1/2x + 1/5x - 1/10x = 2 l ·10
5x + 2x - x = 20
6x = 20 l :6
x = 20/6
x = 10/3
x = 3 1/3
e)
- x - 3 - x - 4 = 1
-2x - 7 = 1 l +7
-2x = 8 l :(-2)
x = -4
f)
a - 4 + a = 6
2a - 4 = 6 l +4
2a = 10 l :2
a = 5
