Answer;
x=9
Step-by-step explanation:
X-(-16)=12+13
X+16 (because its both negative) so
X+16=12+13
Then transpose 16 because you need to find x so
x=12+13-16
16 becomes negative because when you transpose, the sign changes
Then do MDAS
So 12+13=25
Then 25-16=9