Ok i had this question in homework and my method doesnt seem to work for it, can someone please help me?

4-2x=2(8-x) multiply out brackets

4-2x=16-2x -4 both sides

-2x=12-2x +2x both sides

12

i have to work out the value of x but this doesnt seem to work out,

i have also tried

-2x=12-2x +2x both sides

0x=12

but anything times by 0 is x...

Can anyone please help me with this question please? thanks...