Answer:
90 degrees
Step-by-step explanation:
......
x = -1 ,y = -5
--> -2x + 3y +3x-3y = 12-13
--> x= -1
then
--> -2(-1) +3y =-13
--> 2+3y= -13
--> 3y = -15
--> y =-15/3
--> y = -5
Yea i think it is the first one
