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3•{29-3•[15-(54:6+1)]}:(12-5)-6 urgent !!!!!!!!!!!!!!!!!!!!

Răspuns :

3*{29-3•[15-(54:6+1)]}:(12-5)-6=3*{29-3*[15-(9+1)]}:7-6=

=
3*[29-3•(15-10)]:7- 6=3* (29-15) : 7-6= 3*14:7-6= 6-6=0