[texhax] Exempting an equation from alignment

[Lars Madsen]

Soeren D. Schulze :

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> Hello,
>
> I need to format something like this (whitespace-formatted here):
>
>   x (x + 1) = 0
> => x_1 = 0
>       x + 1 = 0
> => x_2 = -1
>
> This is quite a stupid example, but the first and the third line are
> supposed to be aligned (equal signs below each other), whereas the
> second and the fourth line are not supposed to influence the alignment,
> so it should _not_ look like:
>
>            x (x + 1) = 0
> => x_1 = 0
>                x + 1 = 0
> => x_2 = -1
>
> In a table, the command for this would be `multicolumn'.  Is there
> anything similar for align'ed equations?
>

\intertext?


/daleif