Answer:
1) One solution / Infinite
2) No solution
3) No solution
4) One solution / Infinite
5) No solution
6) One solution / Infinite
Explanation:
So I would double check this because I did not end up with any infinite solution equations which I probably should but I tried just solving to see if I could even end up with an answer. I would say all the ones I listed as one solution could either be one solution or infinite solutions.