I want to write two simple equations one below the other, but it seems that aligned environment aligns to the right and I want to align them to the left. Here is the code:

```
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{equation*}
\begin{aligned}
S_1' (x_0) = S_n' (x_n) = 0 \quad \text{(clamped boundary conditions),} \quad \text{or} \\
S_1'' (x_0) = S_n'' (x_n) = 0 \quad \text{(natural boundary conditions)}
\end{aligned}
\end{equation*}
\end{document}
```

which produces

but I want `S_1''(x_0)`

to appear directly below `S_1'(x_0)`

, not to be moved to the left. Do you please know the solution?

## Best Answer

If you want to left-align the material, you need to provide alignments points via

`&`

symbols.