It is the second one, because of pemdas
To find the value of X you would have to solve the equation.
Example: for question 2
The amswer is -24, just gotta do division and subtration
2 times 108 is 216
3 times 72 is 216
4 times 54 is 216
6 times 36 is 216
No -4/3 can not be simplified