besar sudut BOC adalah...

(6x - 5) + (2x + 25) = 180°
6x - 5 + 2x + 25 = 180
8x + 20 = 180
8x = 180 - 20
8x = 160
x = 160/8
x = 20

sudut BOC
= 2x + 25
= 2.20 + 25
= 40 + 25
= 65°

jawabannya 65°
maaf kalau salah ya