The answer is -150 :)
Step-by-step explanation:
First work out what 25 x 6 is.
Once you have your answer (150), work out if it is a negative or positive.
The way you do this is using this simple table:
- x -= positive
- x += negative
+ x += positive
+ x -= negative
So basically if there is one pos. and one neg. it is a negative number. If it is two of the same it is a positive
Hope this helped :)