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I am writing a chapter of a book and I would like some help to display the equations along with a name+number instead of just a number. For example, Eq. 1.11 instead of the default (1.11) which appears when using the equation command.

Another question, I would like to make all the equations flushed left and I managed to figure out how to do this for single equations using the \setlength{\mathindent}{0pt} command, but somehow this doesn't seem to work for gathered equations. Not all equations are shifted all the way to the left of the page when more than one equation is gathered under one equation number.

Thanks :)

closed as unclear what you're asking by Andrew Swann, Circumscribe, TeXnician, Stefan Pinnow, Phelype Oleinik Dec 20 '18 at 17:20

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    Welcome to TeX.SE! – Mensch Nov 30 '18 at 17:33
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    Can you provide the community with some foundation to start with? Something that shows what you've done up to this point? It should start with \documentclass and end with \end{document}. – Werner Nov 30 '18 at 17:36
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    For the tag problem, you have the \newtagform and \usetagform commands from mathtools (§ 3.2 of the doc, Controlling tags. For the alignment problem, the simplest solution would be the fleqn option with the document class, and a systematic use of the align or aligned environments. – Bernard Nov 30 '18 at 17:36
  • @Bernard thanks a lot, your tips worked like a charm :D Before I tried using {align} and it did the job of aligning the gathered equations but then the equation number vanished. The {aligned} environment in equation mode worked perfectly. also, the \newtagform and \usetagform did exactly what I wanted....thanks again! – A Barghati Dec 2 '18 at 13:46

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