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Alina are 8 probleme Daria are de 9 ori mai multe decat Alina Adrian are cat Alina si Daria.

Răspuns :

1 cate probleme are Daria?
8x9=72
2 cate probleme are Adrian?
72+8=80
3 cate probleme au rezvat in total?
8+72+80=160