Answer:
84
Step-by-step explanation:
I'm pretty sure correct me if I'm wrong
108 / (7+2) = 12
7 x 12 = 84
Fill in the given information then calculate the missing parts. See attached picture
3x+12
-0.5x*2+4x+12
Multiply 0.5x*2=x
= -x+4x+12
Add similar elements -x+4x+12
= 3x+12