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I am attempting to split three equations onto separate lines, and I wish to number my last equation, I am starting my commands with \begin{equation} \begin{split}, and after the first and second equation I am using the command \nonumber, however my last equation is not being numbered either. When I do not use the \nonumber command, only my second equation is being numbered. I am not too sure what I am doing wrong?

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    The combination equation and split will give you just one number for the whole group of equations, you want align with \nonumber/\notag, e.g. Numbering Last Equation in List of Equations Nov 10, 2015 at 21:04
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    With an equation environment, you get only one, vertically centered equation number, no matter how many lines the split environment contains.
    – Mico
    Nov 10, 2015 at 21:05
  • That's great, I didn't realise that I couldn't use both equation and split together. Thank you for your help! Nov 10, 2015 at 22:58
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    You can use them together, but you get one number for the whole display (which logically might be better than having all but one line unnumbered and just numbering one line) Nov 11, 2015 at 0:06

1 Answer 1

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With an equation environment, you get only one, vertically centered equation number, no matter how many lines the split environment contains. Your \nonumber statements actually have no effect.

You should, instead, use an align environment, along the following lines:

\begin{align}
a &= b \nonumber \\
  &= c \nonumber \\
  &= d 
\end{align}

That way, only the final row will get an equation number attached to it.

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