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m+2m-(m+m)+3m =
m + 2m - (2m) + 3 m =
m + 2m - 2m + 3m =
m + 2m + 3 m - 2m =
6m - 2m =
4m
Respuesta.
4m
Calculamos sumas y sacamos a Los números del paréntesis medio de la ley de los signos:
3m-m-m+3m=
Calculamos operaciones:
2m-m+3m=
m+3m=
4m
R//: 4m
Saludos;