Question

daniel a citit 40% dintr.o carte si mai are de citit restul de 120 pegini . cate pagini are cartea ?

Answer 1

x- nr de pagini
x-40x/100=120   / *100
100x-40x=12000
60x=12000
x=12000:60
x=200 pagini

Answer 2

100la suta -40la suta=60la suta Facem metoda de trei simpli 60.....120pag 100....x pag 60supra100=120supra x X=100•120:60 =100•2=200pag