August 2023 1 23 Report
Escriba en cada caso el valor de la letra y la propiedad de la adicion que se utilizo porfafor ayuda doy coronita


a) 15 + ( - 8 + x ) = [ 15 + ( - 8 ) ] + ( - 7)

b) 13 + y = 0

c) - 23 + 54 = x + ( - 23 )

d) 23 + ( - 27 ) = z

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