Hello how are you? :)

Today I will tell you how to create a sub-equation environment, and how to declare matrices and some variants of these. Let's start!!!

##
The `subequation`

environment

This environment allows us to *put* multiple equations in a single place. We need to declare the `subequation`

environment and then put each equation in an `equation`

environment

```
\begin{subequations}
\begin{equation}
Equation 1
\end{equation}
...
\begin{equation}
Equation n
\end{equation}
\end{subequations}
```

Produces

But what if we want a subequation not numbered, well we just use the `equation*`

environment

Produces

Remember that you can label any equation in this environment, you can check how to label here or you can check how to label here

## Matrices

The commands to create a matrix are similar to the `table`

environment, but here you do not need to declare the number of columns.

- We use
`&`

to declare the columns - We use
`\\`

to declare a new row

You need to put these matrix environments inside a math environment

The most simple command is `matrix`

Produces

Wait, this is not a matrix!!! where are the parentheses?

Well, there are other matrix environments, let's see

Produces

Thanks, this is all for today

Do not forget to follow me on Twitter `@latexteada`

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