Diana,Camelia si Corina au colectionat 154 ilustrate.Diana si Camelia au impreuna 89 de ilustrate , iar Camelia si Corina au impreuna 188 de ilustrate .Cate ilustrate a colectionat fiecare fetita?
a=diana b=camelia c=corina a+b+c=154 a+b=89 b+c=118 89+c=154 c=154-89 c=65 de timbre are corina a+118=154 a=154-118 a=36 timbre are diana a+c=65+36=101 timbre diana si corina la un loc b+101=154 b=154-101 b=53 ( timbre are camelia)
