I need help! I would greatly appreciate answers for these! I was gone and missed the teaching. thank you in advance!!

Answer:
5) (3,1)
6) (-1,2)
7) (1,1)
8) ???
9) (5,4)
10) (8,6)
11) undefined
12) (7,-4)
Step-by-step explanation:
for 8 i could not tell the first equation sorry