Respuesta :
It has zero solutions because when u subtract z to the other side u get nothing which equals to 2
z=z-4+6
z=z+2
Subtract z from both side
0z=2
Divided 0 for both side
z= undefined. As a result, it has no solution. Hope it help!
z=z+2
Subtract z from both side
0z=2
Divided 0 for both side
z= undefined. As a result, it has no solution. Hope it help!