Răspuns:
III.
Cati baieti sunt in clasa?
[tex]60/100*25=60*25:100=15[/tex]
Cate fete sunt in clasa?
[tex]25-15=10[/tex]
IV.
[tex]45/100*x+110=x\\\\numitor.comun-100\\\\45x+11000=100x\\\\11000=100x-45x\\\\55x=11000= > x=11000:55= > x=200km-lungimea.drumului\\\\verificare:\\\\45/100*200+110=45*20:100+110=200km[/tex]