hey if anyone understands do you you think you could help i'm struggling a little bit :(

Answer:
2x=18
x=9
Step-by-step explanation:
So, to start you subtract 12 from 30 to get 18.
then 18 divided by x gives you 9
so X=9
Answer:
2x = 18 and x = 9
Step-by-step explanation:
i've done it before so i know its right