x=nr.pagini
1=[tex] \frac{60}{100} [/tex]X x=[tex] \frac{3x}{5} [/tex]
2=x-[tex] \frac{3x}{5} [/tex]=[tex] \frac{2x}{5} [/tex]
[tex] \frac{1}{3}X \frac{2x}{5}= \frac{2x}{15} [/tex]
3=16
[tex] \frac{3x}{5}+ \frac{2x}{15} +16=x[/tex]
9x+2x+240=15x
11x+240=15x
240=15x-11x=4x⇒x=240:4=60
1=[tex] \frac{3X60}{5} [/tex] =36 (pagini_