Answer:
The answer would be 17
Step-by-step explanation:
The answer would be 17 because if you add 12 plus 5 That would be your answer
It would 20.5, but rounded off would be 21
I'd say 100 even, don't know if this is a real question or not.
We are given the following equation:

Subtract both sides by 17

Take the positive/negative square root of both sides

This should be your answer. Let me know if you have any questions, thanks!
9 1/8
4/8+5/8=9/8=1 1/8
5+3=8
8+1 1/8=9 1/8