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4x - 15 + 95 = 180°
4x + 80 = 180
4x = 180 - 80
4x = 100
x = 100 : 4
x = 25
∠BAC = 3X - 5
= 3(25) - 5
= 75 - 5
= 70
tpi di optionnya gak ada jawabannya. kita coba
∠BAC + ∠BCA + ∠ACB = 180
70 + 15 + 95 = 180.
jadi sudut ∠BAC banar 70°
70+15+95=180
<BAC=70