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4*5 - 3(3-2/3)=? Ajutoooor !!!

Răspuns :

4 ×5 - 3(3 - 2/3) =
= 20 - 3(9/3 - 2/3) =
= 20 - 3 × 7/3 =
= 20 - 7 =
= 13