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afla termenul necunoscut. becuri+512=720, 129+becuri=670, becuri+237=976, becuri-328=139, becuri-457=208, becuri-548=329, 890-becuri=207, 352-becuri=124, 685-becuri=466

Răspuns :

720-512=208becuri/ 670-129=541/ 976-237=/ 139+328=/ 208+457=/ 329+548=/ 890-207=/ 352-124= Sper ca te.am ajutat