Answer:
-4
Explanation:
3 + - 7
When you these signs together, + and -, or - and +, whatever order it is it remains the same
+ and - always becomes negative
Here you have 3 + - 7
The +- becomes negative (-)
You end up with 3 - 7, or -7 + 3, as the 3 is positive
-7 + 3 = -4