Respuesta:
Explicación paso a paso:
2x + 20 = 80
2x = 80 - 20
2x = 60
x = 60/2
x = 30°
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Respuesta:
x = 30°
Explicación paso a paso:
2x + 20 = 80
2x = 80 - 20
2x = 60
x = 60/2
x = 30°