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sudut EAC = (8x+4)°
EAC = 180-64 = 116°
8x+4 = 116°
8x = 112°
x = 14°
sudut BCD = (7x-2)°
= 7(14)-2
= 98-2
= 96°
sudut ACB = 180-(7x-2)
= 180-96
=84°
sudut ABC = 180 - 64 - 84 = 32°
c. 32