Tolong dijawab ya dengan cara Try out un smp

semoga membantu yaaa

(180 - (3x + 5)) + (180 - (3x - 15)) + (180 - (2x + 10) = 180
3(180) - 3x - 5 - 3x + 15 - 2x - 10 = 180
540 - 8x = 180
8x = 540 - 180
8x = 360
x = 360/8
x = 45

Sudut BAC
= 180 - (3x + 5)
= 180 - (3(45) + 5)
= 180 - (135 + 5)
= 180 - 140
= 40