Hi Wolfgang and OK,

> What is the result you get with LaTeX?
>
>
>

> Is this what you are looking for?
>

This is the expected result, thank you.
Fabrice

Le sam. 5 janv. 2019 à 16:45, Otared Kavian <otared@gmail.com> a écrit :

> Hi Fabrice,
>
> I think you have to use
>          \startalign[n=3,align={left,right}]
> and finish the alignment with
>         \stopalign
>
> Is this what you are looking for?
>
> \starttext
> \startformula
>   \startalign[n=3,align={left,right}]
>    \NC \qquad
> \NC\frac{\lvert\overline{AD}\rvert}{\lvert\overline{CD}\rvert} \NC
> =\frac{\lvert\overline{DC}\rvert}{\lvert\overline{CE'}\rvert}\NR
>    \NC \iff \NC  \frac{1}{x}  \NC =\frac{x}{1-x} \NR
>    \NC \iff \NC 1-x \NC =x^2 \NR
>    \NC \iff \NC 0\NC =x^2+x-1 \NR
>   \stopalign
> \stopformula
> \stoptext
>
> Best regards: OK
>
> > On 5 Jan 2019, at 12:27, Fabrice Couvreur <fabrice1.couvreur@gmail.com>
> wrote:
> >
> > Hi,
> > I'm trying to get the same result for this file compiled with latex.
> > Thanks.
> > Fabrice
> >
> > \documentclass{article}
> > \usepackage{amsmath}
> >
> >
> >
> > \begin{document}
> >
> >
> >
> > \begin{alignat*}{2}
> > &\qquad&
> >
> >
> > \frac{\lvert\overline{AD}\rvert}{\lvert\overline{CD}\rvert}
> >
> >
> > &=\frac{\lvert\overline{DC}\rvert}{\lvert\overline{CE'}\rvert}\\
> > \iff&& \frac{1}{x}&=\frac{x}{1-x}\\
> > \iff&& 1-x&=x^2\\
> > \iff&& 0&=
> > x^2+x-1
> >
> > \end{alignat*}
> >
> >
> >
> > \end{document}
> >
> > \starttext
> > \startformula
> >   \startmathalignment[n=3]
> >    \NC \qquad
> \NC\frac{\lvert\overline{AD}\rvert}{\lvert\overline{CD}\rvert} \NC
> =\frac{\lvert\overline{DC}\rvert}{\lvert\overline{CE'}\rvert}\NR
> >    \NC \iff \NC  \frac{1}{x}  \NC =\frac{x}{1-x} \NR
> >    \NC \iff \NC 1-x \NC =x² \NR
> >    \NC \iff \NC 0\NC =x²+x-1 \NR
> >   \stopmathalignment
> > \stopformula
> > \stoptext
> >
> >
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> >
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> >
> ___________________________________________________________________________________
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
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> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________