How to Type this type of equation?

Help
1

Things I have tried

What I’m trying to do

I was using obsidian to make my math notes and while studying continuity i wanted to type a system of equations
image
how can i do the above?

2 
$$
f(x) =
\begin{cases}
  x, & \text{if $x \leq 1$} \\
  5, & \text{if $x > 1$}
\end{cases}
$$