39°+(4x-6)°+3x°=180°

39° + 4x° - 6° + 3x° = 180°
7x° = 180° + 6° - 39° = 147°
x = 21°

Semoga Bermanfaat! :)
Jika puas dengan jawaban saya, tolong berikan saya terima kasih dan memilih jawaban saya sebagai jawaban terbaik (atau "Mark as Brainliest") Makasih❤ :D

39°+(4x-6)°+3x = 180°
= 39°- 6°+4x+3x = 180°
= 33°+7x = 180°
= 7x = 180°- 33°
= 7x = 147°
= x = 147°/7
= x = 21°