я не успела
325-(x-617)=219 325-x+617=219 942-219=x x=723 325-(723-617)=219 468-(259-x)=382 468-259+x=382 209+x=382 x=382-209 x=173 468-(259-173)=382
325-(х-617)=219 х-617=325+219 х-617=544 х=617-544