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Ofer20p
Mihai a parcurs 30la suta dintr-un drum si mai are de parcurs 210 km .Cati km are drumul ?


Răspuns :

30x/100+210=x
30x+21000=100x
21000=70x
x=300km
Fie x drumul( in km )70/100×x=210 => 7x/10=210 => x=210×10/7 => x=300 km avea drumul.