В.
(5x + 12)
(9x + 1)
С
A
(10x- 37)°

Answer:57
Step-by-step explanation:
(5x+12)+(9x+1)+(10x-37)=360
24x-24=360
24x=384
X=16
<bca= (10x16-37)=123
<bca= 180-123= 57