Answer:
Depends
Explanation:
-9 + 7 = -2
7 - n = ?
Well the letter "N" could be of any value ( number ) therefore, no they are not the same.
Example:
IF -9 + 7 = -2 IS...
IF N = 1.
IS 7 - 1 equal to -9 + 7? No, because 7-1 = 6 and -9 + 7 = -2
IF N = 2.
IS 7 - 2 equal to -9 + 7? No, because 7 - 2 = 5 and -9 + 7 = -2
and so on...
However:
-9 + 7 and 7 - 9 are the same. I'm pretty sure it's the commutative property.