Answer:
2, 3, 4 all have one solution.
Step-by-step explanation:
The first one has no solution.
The second one has a solution of -65/68.
The third one has a solution of 5.
The fourth one has a solution of 13/2.
Hope this helps!!
Let me know if I'm wrong...
There are 5 faces, 5 vertices, and 8 edges, so all of that together is 18