-2 or 2 either one
Hope this helps
Answer:subtract
Step-by-step explanation:
xinmofvd
Answer:
x= 6
Step-by-step explanation:

You will subtract 10x from 12x and get 2x

Subtract 4 from 16 to get 12

You will then divide both sides by 2
= 
x= 6
The second one is hard to read but since ∠3 is 54° you should just start from there
Hope this helps
hope im right but i think it 1 sorry if im wrong