Question

How do I reference an {equation} with the same equation number later in the document?

I have:

\begin{equations}
\begin{align}
y = mx + b
\end{align}
\end{equations}

And it shows that it's equation (1) in my document. How do I repeat that same equation later in my document after other equations with the same equation number (1)?

Answer 1

maybe you could copy the latex code from the equation and pate it in there later

Answer 2

I did but then it shows the equation number as something else like (5) or something

Answer 3

```
\begin{equation} \label{eq1}
\begin{align}
y = mx + b
\end{align}
\end{equations}
```
By adding the \label{eq1}, you can later type \ref{eq1} and it should reference your equation

Answer 4

Those question marks should be `\ref{eq1}`.