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x-12=y
2x-12=102
x=57
y=45
Numero menor = x
Numero mayor = x + 12
x + x + 12 = 102
2x + 12 = 102
2x = 102 - 12
2x = 90
x = 90/2
x = 45
Respuesta.
El numero menor es 45
El numero mayor = x + 12 = 45 + 12 = 57