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cum se rezolva ecuatia asta: modulu lui x-3,1  =2x-7?

Răspuns :

  x-3=2x-7                                                                                                                   x+2x=3-7                         2x=(-4)               x=(-4)ipartit la 2       x=(-2)                scrie in colonita

                                                                                                           

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