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12a = -20 -16
12a = -36
a = -36/12
a = -3
Aplicamos la propiedad distributiva.
a(b + c) =ab + ac.
Resolver.
4(3a) + 16 = - 20
12a + 16 = - 20
Despejamos la variable "a".
12a = - 20 - 16
12a = - 36
a = - 36/12
a = - 3
El valor de es: - 3
Respuesta.
-3