x zile............................11 pag.
x-3................................14 pag.
2x-3=25
2x=25+3
x=28:2
x=14 zile
daca citeste 11 pag, pe zi termina cartea in 14 zile
daca citeste 14 pag. pe zi termina cartea in 11 zile (14-3)
14x11=154 pagini
R: cartea are 154 pag.
.....................................................................
7 piese.....................................x zile
5 piese.....................................x+2 zile
2x+2=12 piese
2x=12-2=10
x=10:2
x=5
dacain 2 zile face 8 piese......intr-o zi face 4 piese
5x4+8=28 piese
