Math & Science ⇒ aligning text with first equation in flushleft environment

[ghostanime2001]

How can I make "x direction:" perfectly aligned with the top line of T_{1x}+T_{2x}=0 equation and still keeping the two equations flushleft?

Here is my code I am trying to fix:

Code: Select all

\documentclass[fleqn]{article}
\usepackage{fullpage}
\usepackage[margin=1in]{geometry}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{xfrac}
\usepackage[makeroom]{cancel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{siunitx}
\pagestyle{empty}
\sisetup{%
  output-decimal-marker={.},
  load-configurations=abbreviations,
  group-separator={,},
  per-mode=fraction,
  fraction-function=\sfrac}
\usepackage{fix-cm}
\setlength{\mathindent}{0pt}
\begin{document}
x direction:
\begin{flushleft}
T_{1x}+T_{2x}=0 \\
-T_{1}\cos\theta_{1}+T_{2}\cos\theta_{2}=0 
\end{flushleft}
\end{document}

[Stefan Kottwitz]

For example:

Code: Select all

\noindent x direction:
\begin{align}
  &T_{1x}+T_{2x}=0 \\
  &-T_{1}\cos\theta_{1}+T_{2}\cos\theta_{2}=0
\end{align}

Don't use a flushleft environment, this is for text, not for math.
You could also use two equation environments.

While setting \mathindent to 0pt removes indentation of math environments, \noindent removes indentation of text.

Stefan

[ghostanime2001]

How can I set those two equations to be right-aligned? like with the flushleft effect? And what happened to aligning the top equation as a block with the text?

[Stefan Kottwitz]

Right aligning can also be done with a flalign environment:

Code: Select all

\begin{flalign*}
  &&T_{1x}+T_{2x}=0 \\
  &&-T_{1}\cos\theta_{1}+T_{2}\cos\theta_{2}=0
\end{flalign*}

Stefan

[ghostanime2001]

I'm still not getting a way to put x direction with the two equations. What is the code for right aligning?