La solución de la ecuación 4 – (5 + 3) – 1 = 6 – 1 es:
a. = −3
b. = 2
c. = 6
d. = −
a. = −3
b. = 2
c. = 6
d. = −
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Respuesta: -5
Explicación: 4 - 8 - 1 = - 4 - 1 = - 5