Answer:
28
Step-by-step explanation:
18+6+4=28
The answer is C
4(3-x)+6x=3x+12-x All real numbers are solutions.
So, initially 240

-212

were empty:
this is :

12/4 is 4 so that's why i substituted it with 4.
now, later 27 1/3 were used so we add this tho the original empty space

=

=
which is the result!