Respuesta:
39
Explicación paso a paso:
2(x-1) = 80
(x-1) = 80/2
x + 1 =40
x= 40 - 1
x= 39
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Respuesta:
39
Explicación paso a paso:
2(x-1) = 80
(x-1) = 80/2
x + 1 =40
x= 40 - 1
x= 39