1)in cadrul unui concurs un elev obtine pt 10 raspunsuri 130 de punc.sa se afle cate raspunsuri au fost corecte si cate gresite,stiind ca pt un raspuns corect a obtinut 25 de puncte,iar pt unul gresit a pierdut 15 punc.
2)impartind doua nr nat,obtinem cate 14 si restul 3.daca impartim suma lor la diferenta lor,obtinem catul 1 si restul 26.aflti nr.
Banuiesc ca ai facut sistem cu 2 necunoscute,ex se rez:
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