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180° = (95° + (3x-5)° + (x-10)°)
180° = (95° + 3x - 5° + x - 10°)
180° = 80° + 4x
4x = 100°
x = 25°
besar sudut BAC = 3x - 5° = 75° - 5° = 70° (D)