The answer is 9 shown below a b c triangle shown below ⬇️
Step-by-step explanation:



HOPE IT HELPS Y
You can soustracte the first or the second one
and y cancel
x = 6
now you put 6 in x
you can take the first or the second one
6 - y = -2
6 - y = -2
y = -8
Answer:
2, 8, 90, 160
that is the focal, vertex l, direction