Indentation of equation numbers from left margin

manpreet Best Answer 3 years ago

I seek help in finding an efficient way, upon creating a symbolic or textual expression by means of a \begin{equation} command, to indent from the left margin not only the expression but its parenthetically enclosed number. (Motivation for this consists in the editorial convention for logic that presents the premises and conclusion of a deductive argument, whether expressed in symbolic form or prose, as a sequence in which each statement occupies an indented line beginning with an assigned number.) The goal is to indent the numbers from the left margin by n pts. and to indent the statements by m pts. for 0 < n < m. Usually n is at least as great as \parindent. For example, n = 32, m = 48.

I'm a neophyte at TeX, and this is my first posting here. Learning from various sources, I began by trying the following.

\documentclass[12pt,letterpaper,leqno,fleqn]{article}
\usepackage{amsmath}
\usepackage{latexsym,amssymb}
\setlength{\mathindent}{24pt}
\newcommand{\texteq}[1]{\begin{equation}\text{\parbox{0.85\textwidth}   {#1}}\end{equation}}
\begin{document}
## [A] ##
\begin{equation}
p \implies q
\end{equation}
\begin{equation}
p
\end{equation}
\begin{equation}
∴ q
\end{equation}
## [B] ##
\texteq{All bachelors are unmarried.}
\texteq{Jones is a bachelor.} 
\texteq{∴ Jones is unmarried.}

\end{document}

[A] yields the following.

Prior text

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