Respuesta:
6
Explicación paso a paso:
876 + x = 9°
9° + 3 + x = 9°
x+3= 9°
x = 6
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Respuesta:
6
Explicación paso a paso:
876 + x = 9°
9° + 3 + x = 9°
x+3= 9°
x = 6