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suma a doua numere nat de 2 cifre este 32.Calculati cate soluti are problema
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Răspuns :

a+b=32;
⇒a si b-numere naturale de 2 cifre;
⇒a,b∈[[10,22],[11,21],[12,20],[13,19],[14,18],[15,17],[16,16],[17,15],[18,14],[19,13],[20,12],[21,11],[22,10]];