Answer:
ADD 4
Step-by-step explanation:
you want to get 2x by itself so you want to do opposite of -4 so you would do +4 and they cancel out, and what you do to one side you do to the other so
2x = 12 +4
2x = 16
and then you would divide the 2 on both sides so
x = 8 ... just in case you later need to know what x is :)
