To left-align equations globally, use the fleqn
option when loading amsmath
. To left-align equations for only part of the document, you could load the nccmath
package and use its fleqn
environment. But then you'd still have the equations in actual equation
environments, which creates vertical spacing problems.
It seems pretty simple to make your own inline equation tags, though, so try this:
\documentclass{minimal}
\newcommand{\teqtag}{\hfill\stepcounter{equation}(\theequation)}
\begin{document}
\begin{tabular}{p{2 in}@{\hspace{0.25 in}}p{2 in}}
$\alpha=\beta+\gamma$\teqtag & $c=20x^2+5x-10$\teqtag \\
$\alpha=\frac{10x}{\int y\,dx}+\gamma$\teqtag & $c=20x^2+5x-10$\teqtag\\
$x_f=x_0+v_0 t$\teqtag & $\mu=10*\epsilon$\teqtag
\end{tabular}
\end{document}
Or to number the equations column-first (and put the tag on the left while we're at it):
\documentclass{minimal}
\newcommand{\lteqtag}{\stepcounter{lequation}(\thelequation)\ }
\newcommand{\rteqtag}{\stepcounter{requation}(\therequation)\ }
\newenvironment{spliteqs}%
{\newcounter{lequation}%
\newcounter{requation}%
\setcounter{lequation}{\value{equation}}%
\setcounter{requation}{\value{equation}}%
\addtocounter{requation}{3}}% number of left-column equations
{\setcounter{equation}{\value{requation}}}
\begin{document}
\begin{spliteqs}
\begin{tabular}{p{2 in}@{\hspace{0.25 in}}p{2 in}}
\lteqtag$\alpha=\beta+\gamma$ & \rteqtag$c=20x^2+5x-10$ \\
\lteqtag$\alpha=\frac{10x}{\int y\,dx}+\gamma$\ & \rteqtag$c=20x^2+5x-10$\\
\lteqtag$x_f=x_0+v_0 t$ & \rteqtag$\mu=10*\epsilon$
\end{tabular}
\end{spliteqs}
\end{document}