Penjelasan dengan langkah-langkah:
180° = (2x + 30°) + (3x + 50°)
180° = 5x + (30° + 50°)
= 5x + 80°
5x = 180° - 80°
= 100°
x = 100° ÷ 5
= 20°
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Penjelasan dengan langkah-langkah:
180° = (2x + 30°) + (3x + 50°)
180° = 5x + (30° + 50°)
= 5x + 80°
5x = 180° - 80°
= 100°
x = 100° ÷ 5
= 20°