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19-{14-[12-(7+3)]}=?Ajutati-ma!!

Răspuns :

19-{14-[12-(7+3)]}=
19-[14-(12-10)]=
19-(14-2)=
19-12= 7
R:7
[tex]=19-[14-(12-10)]= \\ =19-(14-2)= \\ =19-12= \\ =7[/tex]