Suplemen dari 4x° adalah 5x°
maka
4x° + 5x° = 180°
9x° = 180°
x = 180° : 9°
x = 20
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Verified answer
Suplemen dari 4x° adalah 5x°
maka
4x° + 5x° = 180°
9x° = 180°
x = 180° : 9°
x = 20