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3•{5•[7•(4x -10)-13]-3}+1=7
Ajutorrrr


Răspuns :

3×{5×[7×(4x-10)-13]-3}+1=7
3×{5×[7×(4x-10)-13]-3}=7-1=6
5×[7×(4x-10)-13]=6÷3=2
7×(4x-10)-13]=IMPOSIBLE