Respuesta:
-68
Explicación paso a paso:
= 20 – 19 – (–7) – (+64) + (–12)
= 20 - 19 + 7 - 64 - 12
= -68
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Respuesta:
-68
Explicación paso a paso:
= 20 – 19 – (–7) – (+64) + (–12)
= 20 - 19 + 7 - 64 - 12
= -68