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104:[(X-3×8)×2:8]=13 rezolvare prin metoda mersului invers

Răspuns :

104:[(X-3×8)×2:8]=13
(X-3×8)×2:8 = 104:13
(X-24)×2:8 = 8
(X-24)×2 = 8×8
(X-24)×2 = 64
(X-24) = 64:2
X-24 = 32
X = 32+24
X = 56

Verificare:
104:(32×2:8) = 104:8 = 13