Tolong jawab no 3 ya plissss

A.
( x + 5 ) + 65 + ( 2x - 13 ) = 180
x + 5 + 65 + 2x -13 = 180
3x + 57 = 180
3x = 180 - 57
3x = 123
x = 123/3
x = 41

B. 
sudut DAO = sudut BAO = 46 drajat

C.
sudut BCO = sudut DCO = 69 drajat

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please find the answer