Answer:
-3 or 6 I would put -3 but... its your wish
Step-by-step explanation:
-3
3x + 12 - 2x = 9
Subtract 3x - 2x
x + 12 = 9
subtract 12 to both sides
x = -3
Hope this helps, can you please mark me brainliest? I just need 2 more brainlest to become expert.
