Respuesta:
Explicación paso a paso:
120+2X = 180
2x = 180 - 120
2x = 60
x = 60/2
x = 30°
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Respuesta:
x = 30°
Explicación paso a paso:
120+2X = 180
2x = 180 - 120
2x = 60
x = 60/2
x = 30°