Answer:
10
Explanation:
Parentheses first so
7-10=-3
then the brackets
-2-3-15=-20
-4-20=-24
so thats the numerator
the denominator is
2(-1)=-2
-20/-2= ?
We can remove the negative because two negatives make a positive then we would divide by 2
20/2=10
and that's our answer! :)