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If I want to change the equation numbering I can use

\addtocounter{equation}{n}.

How do I change the subequation numbering? E.g. if I want to label a subequation by 1.7?

  • 4
    The subequations environment actually uses the equation counter, so you'd need \setcounter{equation}{7}. The parent equation number is temporarily stored in the parentequation counter. – Phelype Oleinik Aug 30 '19 at 21:05
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I am using align as an example here. You just have to use \setcounter before subequations environment to change the parent equation number. Using setcounter inside subequations environment will change the child equation/subequation number.

\setcounter{equation}{parent_equation_number}
\begin{subequations}
\setcounter{equation}{child_equation_number}
\begin{align}
<You equations go there>
\end{align}
\end{subequations}

Hope, this helped!

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