Ok so x+4-1 makes x-1 so i belive the answer could be 1/5
I believe the answer for 17 is C. 18 I am not sure how to do. For 19, however, the answer is B. Hope I help, and sorry I can't answer 18.
I’ve attached a photo, with the instructions. Hope it helps. If you have any questions don’t hesitate to ask
It should have 2 solutions