Where is the rest of the problem?
If
x+y=-4
y-3x=16 or we cn write as
x+y=-4
-3x+y=16
i multiply the first equation by 3
3x+3y=-12
-3x+ y=16
4y=4
y=1
x+1=-4
x=-5
See attachment for math work and answer.
Answer:
70 degrees
Opposite angles are equal to each other
How did you put multiple pictures on this app? i can’t figure how to