hello, it is $x=y=z=2$ Sonnhard.

Adding all of equations we have : $ (x-2)^2+(y-2)^2+(z-2)^2=0 $ then $ x=y=z=2 $

shmm wrote: Multiplying all of equations we have : $ (x-2)^2+(y-2)^2+(z-2)^2=0 $ then $ x=y=z=2 $ How do you get that by multiplying all of the equations? Could you please tell, I actually reached upon in a different manner..., you see.. :