Respuesta:
Explicación paso a paso:
100+4x = 180
4x = 180-100
4x = 80
x = 80/4
x = 20°
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Respuesta:
B) 20°
Explicación paso a paso:
100+4x = 180
4x = 180-100
4x = 80
x = 80/4
x = 20°