X=-3
because
-4x=21-9
-4x= 12 divide both sides
x=-3
Answer:
positive
Step-by-step explanation:
Answer:
i don't get the way you wrote it
Step-by-step explanation:
Answer:
linear pair = 3,1 or 5,7
vertical angles = 7,8
supplementary = 1,8 or 2,7
Step-by-step explanation: