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rezolvați ecuatia: 7×{2+6×[20-3×(11×3-27)]}+x=2109

Răspuns :

7*{2+6*[20-3*(33-27)]}+X=2109; 7*[2+6*(20-3*6)]+X=2109; 7*[2+6*(20-18)]+X=2109; 7*(2+62*)+X=2109; 7*(2+12)+X=2109; 7*14+X=2109; 98+X=2109; X=2109-98; X=2011