x x+2/3 z+2/3 z+1/3 y+1
Motiva la risposta
@zeunig356 @Giulio_M
(x + y + z)/3 = x/3 + y/3 + z/3 = (z+1)/3 + (z + 1)/3 + z/3 = 3 z/3 + 2/3 = z + 2/3
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