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a fost răspuns

I) 324:[108:(21+54:9x5:30+45:9)]+19=

Răspuns :

Humaroxana123
324:[108:(21+6×5:30+5)]+19=
=324:[108:(21+30:30+5)]+19
=324:[108:(21+1+5)]+19
=324:(108:27)+19
=324:4+19
=81+19
=100