bantu jawab ya kak, sama caranya nanti aku jadiin jawaban tercerdas
![](https://id-static.z-dn.net/files/d04/dd10a988233544c14ad6447c273a7af1.jpg)
Jawab:
x° = 70°
Penjelasan dengan langkah-langkah:
Diketahui:
Sudut 2x° + 40° = 180°
Maka,
2x° + 40° = 180°
2x° = 180° - 40°
2x° = 180° - 40°
2x° = 140°
x° = 140°/2
x° = 70°
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