Answer :
If Stephanie bought 200 stickers and this amount is 4 times the amount that Jenny bought, we can write:
[tex]200=4\cdot x[/tex]being x the amount that Jenny bought.
We can solve this as:
[tex]\begin{gathered} \frac{200}{4}=\frac{4\cdot x}{4} \\ 50=x \\ x=50 \end{gathered}[/tex]Answer: Jenny bought 50 stickers.