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Cum se rezolva exercitiul:
19-{12-[10-(6-1)]}


Răspuns :

19-{12-[10-5]=19-{12-5}=19-7=2
[tex]19-\{12-[10-(6-1)]\}= \\ =19-[12-(10-5)]= \\ =19-(12-5)= \\ =19-7= \\ =12[/tex]