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I thought I was doing everything correctly, but clearly not. I want my equations (all whether I use \begin{flalign} or \begin{equation}) to be aligned each other (have the same indent), and then when using the flalign I want the equations to align at the & sign. I have put in fleqn in the document class, I have used \mathindent, however when I use flalign although the equation itself aligns at the & marks like it should, the start of the equation does not match the indent of the equation above. Currently I have the following (Excuse the massive preamble I put it in incase something was countering something else or if that is where the issue is):

\documentclass[a4paper,12pt,fleqn,titlepage]{report}
\usepackage{amsmath}
\setlength{\mathindent}{1cm}

\begin{document}

\begin{equation}
\label{whatever}
a = b
\end{equation}

words and stuff

\begin{flalign*}
a & = b&
\\
& = c&
\\
& = d&
\end{flalign*}

\end{document}
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    Please reduce your example. There are irrelevant packages and commands for your issue. – Marco Daniel Apr 12 '13 at 12:30
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    It is as easy for you to remove packages from the preamble and check that the problem is still there as it is anyone else. – David Carlisle Apr 12 '13 at 12:36
  • Has been edited, apologies. – adrem7 Apr 12 '13 at 12:52
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    it is still far from minimal \documentclass[a4paper,12pt,fleqn,titlepage]{report} \usepackage{amsmath} \setlength{\mathindent}{1cm} \begin{document} would have been enough (I was going to post an answer but Ethan beat me to it by a second or two:-) – David Carlisle Apr 12 '13 at 12:53
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Use align* instead of flalign*.

Here's the output - works with all your packages:

enter image description here

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3
  • Perfect, thanks, just out of curiosity, what is the difference/why does this happen with flalign? – adrem7 Apr 12 '13 at 12:54
  • I don't know - I just guessed the fix. This may answer your question: stackoverflow.com/questions/2632628/… (that should really migrate to tex.se). – Ethan Bolker Apr 12 '13 at 13:03
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    @adrem7 The point is flalign flushes the output to the extremes in a page. To see this, look at the documentation (p.27 as printed, p.31 pdf page number): here – kan Apr 12 '13 at 13:06

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