The answer to this question is that there are many integers with deifferent signs when added the answer is 8.
For example,
+13 and -5 are two integers with different signs when added the answer will b 8.
The sum of integers +12 and -4 is also 8. +11 and -3, +10 and -2, +14 and -6 also gives 8 answer when added.
There are many others.