I have, let's say, 5 of the equations spread throughout the document and I want them to be aligned similarly. The equation consist of two parts — the formula itself and short descriptions (let's say boundaries). Obviously, there can be a lot of text (plus figures between) between any two equations. Can all the equations (and their parts) be aligned in the same way? This is an example:

```
\[
G=G_{I}=\begin{cases}
\cfrac{K_{I}^{2}}{E} & \text{plane stress}\\
\cfrac{(1-\nu^{2})K_{I}^{2}}{E} & \text{plane strain}
\end{cases}
\]
```

One equations with two lines, short comment about them, the part on the right aligned in the same way. However, I can't find a solution to align these throughtout the document (i.e., in multiple equations). It should look something like this

but the boundaries in this case are misaligned and the `&`

operator can't be used. Is there a feature I'm missing or a workaround?

## Best Answer