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x, x + 1
el dato dice que:
x = [ 3x/4 - 2(x+1) /5 ] + 81
x = 3x/4 - 2x/5 - 2/5 + 81
x - 3x/4 + 2x/5 = 81 - 2/5
x/4 + 2x/5 = 403/5
13x/20 = 403/5
x = 124
por lo tanto los numeros son: 124 y 125