Respuesta :

 | 3 - 6x | = 15

3-6x = 15 
-6x = 15 -3
-6x = 12
x = -2

-(3-6x) = 15 
-3+6x = 15
6x = 15 +3
6x = 18
x =3

solutions x = -2 and x = 3
- 6 x = 15 - 3
-//- = 12
... - x = 12 / 6
-//- = 2
- x = 2