I think it will be a solution. Hope it help!
Do you have step one? maybe i can try it but im not that good in math
The answer is D because they take a tile out which makes it 7 tiles in the bag but then they put it back which makes the bag have 8 tiles in it again.
Answer:
Union of inqualities:
x<7 or x>8
(not sure if this helps or not sorry!)
The are parallel to each other because the are both straight horizontal lines
