scrie sub forma de impartire dupa model.30-5-5-5-5-5-5=0,35-5-5-5-5-5-5-5=0,40-5-5-5-5-5-5-5-5=0,45-5-5-5-5-5-5-5-5-5=0,50-5-5-5-5-5-5-5-5-5-5=0