Answer:
Actually,I don't understand the que but I will try.
Step-by-step explanation:
Supplementry it means the pair of angle that sum if 180° similarly, complimentry angle sum is 90°
C the horizontal line represents x and it goes to -1 you place your coordinates as (x,y)
Your answer is x= -6 you may review the image I've attached to see how i got my answer.