How do I align math in LaTeX (as in a proof) ?

[Ray]

Hello,

How can I align math in LaTeX (as typically seen in a proof)?

Specifically, I would like each successive line of math to align with
the same equal sign on the previous line (immediately above it).

Thank you!
Ray L.
NY, USA

[Tariq]

Simplest solution is to use \begin{align} ... \end{align} environment
(or its starred version). You can declare what character to align
with. good luck.

Tariq

[Patrick]

You could use the align environment in amsmath. You can use it similar
to a table, for example

\begin{align}
y &= 4x+6\\
&= 2x + 3
\end{align}

Cheers,
Patrick

[Patrick]

Of course the math (if one could even call it that) made little sense in
the example, but I still hope it helped.

Cheers,
Patrick

[Joris]

or with amsmath

\begin{equation}
\begin{aligned}
a & = b \\
& = c \\
& = d.
\end{aligned}
\end{equation}

which centers a single equation number vertically, whereas with align
all lines are individually numbered by default, but the numbering can
be turned off for each individual line.

[Andrew]

On Dec 16, 7:39 am, Patrick <patrick.steegs...@physics.gu.se> wrote:
> Of course the math (if one could even call it that) made little sense in
> the example, but I still hope it helped.

Sure it makes sense, the solution is x = -1.5, y = 0 :-).