[tex]x \to paginile \ albumului \\\\ 5x+6 \to nr. \ de \ cartonase \\ 6(x-4)+4\to nr. \ de \ cartonase \\\\\\ 5x+6=6x-24+4 \\\\ 5x+6=6x-20 \\\\ 5x-6x=-20-6 \\\\ -x=-26 \\\\ \boxed{x=26 \ pagini} \\\\\\ 5*26+6= \\\\ =130+6= \\\\ =\boxed{136 \ cartonase}[/tex]