I honestly don’t know what to put here anymore

8+a
I'm not too sure, but I think this might be the answer because 8 can't be combined with a variable.
If my answer is correct, be sure to give me a brainliest!
You cannot combine a variable and a constant. However, note that the denominator is the same. So what you put is:
a/b + 8/b = (a + 8)/b
a + 8 is your answer
hope this helps