|2x-1|=5
=> 2x-1=5 hay 2x-1=-5
2x = 6 2x = -4
x = 3 x = -2
gud chop :)
| 2x - 1 | = 5
* 2x - 1 = 5
2x = 5 + 1
2x = 6
x = 6 : 2 = 3
* 2x - 1 = -5
2x = -5 +1
2x = -4
x = -4 : 2 = -2
Vậy x = 3 ; x = -2