Question

ayuda porfavor
21 - {-(31 + 8) + [- 5 -(4 - 9)]} - [-(3 - 7)]

Answer 1

Respuesta:

56

Explicación paso a paso:

21 - {-(31 + 8) + [- 5 -(4 - 9)]} - [-(3 - 7)]

21 - {-(39) + [- 5 -(- 5)]} - [-(-4)]

21 - {-39 + [- 5 + 5]} - [+4]

21 - {-39 + [0]} - 4

21 - {-39 +0} - 4

21 - {-39} - 4

21 + 39 - 4

60 - 4 ---> 56