Jawaban:
B. 20°
Penjelasan dengan langkah-langkah:
5x+80° = 180°
5x= 180°-80°
5x= 100°
x= 100 :5
x= 20°
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Jawaban:
B. 20°
Penjelasan dengan langkah-langkah:
5x+80° = 180°
5x= 180°-80°
5x= 100°
x= 100 :5
x= 20°