Two inequalities displaying side by side, but nicely spaced in LaTeX

Question

In LaTeX, I have two ineqaulites e.g. a \leq b and c \leq d. I want to have a numbered line which has both of these inequalities on it:

a \leq b      c \leq d     (1)

Like this. What's the easiest way to get the spacing to behave itself? Which environment should I use?

Answer 1

For some space, just use \quad, \qquad or any other spacing command of your choice (maybe \hfill?).

I don't know about any environments to do this, the environments that come with the AMS packages are meant to align columns (so they're only useful if you have multiple lines).

Answer 2

You should use the amsmath package (for spacing options). The do the following:

\begin{equation}
a \leq b \qquad c \leq d
\end{equation}