How to set the equation no with quad space to equation content (centered) like below

Sample Text  Sample Text   Sample Text

             (1.1)  A + b = 20

Sample Text

Can anyone suggest how to get these output.


As a once-off, you can set it manually using the construction below with \numeq:

enter image description here

\section{A section}
Sample text sample text sample text
  \numeq A + b = 20 \label{eqn:stuff}
Sample text and see~(\ref{eqn:stuff}).

For an automated way of adding these to equations, you could add


to your document preamble. This would make all formerly unnumbered equations now numbered. But without more detail, I'm not sure what scope we're talking about.

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