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scrie toate numerele de forma S Z U ,care indeplinesc conditia.


s=z+u=8


Răspuns :

daca s =z+u  iar z +u=8 => s=8
atunci z ∈ {0,1,2,3,4,5,6,7,8} , u ∈ {0,1,2,3,4,5,6,7,8}
numerele formate :

808, 817, 826, 835, 844, 853, 862, 871,880
817,826,835,844,853,862,871