[tex]\text{Notam cu x pretul initial}\\
x+\dfrac{25}{100}x+\dfrac{25}{100}\left(x+\dfrac{25}{100}x\right)=3125\\
x+\dfrac{x}{4}+\dfrac{1}{4}\left(x+\dfrac{x}{4}\right)=3125\\
\dfrac{5x}{4}+\dfrac{1}{4}\cdot \dfrac{5x}{4}=3125\\
\dfrac{5x}{4}+\dfrac{5x}{16}=3125 |\cdot 16\\
20x+5x=5000\\
25x=50000\\
\boxed{x=2000\ lei} [/tex]
