First, determine the value of x. Then find the measure of ∠BCA. Will brainlist first correct answer.

Answer:
x = 16
Step-by-step explanation:
the labeled angles are all exterior
the sum of all exterior angles always equals 360 degrees
9x+1 + 5x+12 + 10x-37 = 360
24x - 24 = 360
24x = 384
x = 16