# How can I label an equation as (*) [duplicate]

Here is the code which has an equation in the form of $...$:

\documentclass[12pt]{report}
\usepackage{braket}
\usepackage{amssymb}
\usepackage{amsmath}
\begin{document}
\textbf{Proof-} Every element of $\Delta(G)\Delta(G,N)\subset N'$ can be written as $$(x-1)y(n-1)$$ where $$x,y\in G$$ and $$n\in N$$. Now, because we can write $$(x-1)y=xy-y=(xy-1)-(y-1)$$ we also can write every $(g-1)$ in the form : $g-1=\sum_{i,j}a_{ij}(x_i-1)(n_j-1), \hspace{2pt}\ a_{ij}\in \mathbb{Z}, x_i\in G, n_j\in N$
\end{document}


My question is how to label the last formula as (*)? All the answers I can find has aligned equations, but in this case I only have one $...$ equation which I want to label. One way is to use \hspace and then put label, but is there any other way?

## marked as duplicate by Werner, cfr, Sean Allred, Jesse, Paul GesslerJul 23 '15 at 3:53

Use the \tag{<your label>} command to insert a custom label as you wish like this \tag{*}:
\documentclass[12pt]{report}
\textbf{Proof-} Every element of $\Delta(G)\Delta(G,N)\subset N'$ can be written as $$(x-1)y(n-1)$$ where $$x,y\in G$$ and $$n\in N$$. Now, because we can write $$(x-1)y=xy-y=(xy-1)-(y-1)$$ we also can write every $(g-1)$ in the form : $g-1=\sum_{i,j}a_{ij}(x_i-1)(n_j-1), \hspace{2pt}\ a_{ij}\in \mathbb{Z}, x_i\in G, n_j\in N \tag{*}$