Află numărul necunoscut: (7 x 12 x 340) : b = 8, Calculează: 525 : 5 + 273 x 2 x 4, Dublul sumei a patru numere consecutive pare este 744. Află cele patru numere., Află numărul necunoscut: c x (612 : 12) = 64.158, Care este valoarea lui d? d = 461 x 2 + 2000 - 766, Îndoitul unui număr însumat cu doimea sa reprezintă 25. Care e numărul?.

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