I am trying to left align a block of equations.
I've already tried this
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align*}
<b, \pi_u(x)-x> = 0 \\
<=> \\
<b,\pi_u(x)> - <b,x> = 0
\end{align*}
\end{document}
and this
\begin{flushleft}
\end{flushleft}
and this
\begin{equation}
\begin{split}
\end{split}
\end{equation}
none of them get me a left align.
&
and aright part. The lest part is right aligned, and the right part is left aligned. Since you have no
&` on your rows they are all let parts and is this right aligned. Try starting each row with&
.<..>
is the wrong syntax here, use\langle b, c \rangle