I have a table of formulas, some have a description next to them, I want the equations to appear left flush and the text between parentheses right flush. I was writing it in the following way.
\documentclass[letterpaper,10 pt,twocolumn,fleqn]{article}
\setlength{\columnsep}{2.5cm}
\usepackage[inner=2.5cm,outer=2.5cm,bottom=2.5cm,top=2.5cm,landscape]{geometry}
\usepackage{nopageno,array,graphicx,amsbsy,amsfonts}
\usepackage{amsmath}
\begin{document}
\[{\bf P} = \int_{t_i}^{t_f}{\bf F}\,dt = \Delta{\bf p}\mbox{\hspace{7mm} (Impulse) }\]
\[\frac{dA}{dt} = \frac{l}{2\mu}=cte \mbox{\hspace{7mm} (Kepler's Second Law) }\]
\end{document}
but the alignment is different for each equation.
\documentclass{...}
and ending with\end{document}
. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to help you. Help them help you: remove that one hurdle between you and a solution to your problem.\tag*
is.