Double alignment in LaTeX

Last day I was writing a proof of a theorem in \(\LaTeX\), when I realized that I needed to use a symbol meaning implications for efficiency purposes. It is usual in mathematics that one thing leads to another, and it is also usual that we use \(\Rightarrow\) as implication symbol. This way, I looked for this issue in the web and I found that double ampersand (&&) could be used to align, just in the same way that one is used to do it with a single ampersand (&). For example, note the implications in the following equations (along as the alignment at the equal symbol and the alignment at left):

Therefore, I used this piece of code in order to get things done.

\begin{align*}
&& x + 2 &= 4 + 6 \\
\Rightarrow && x &= 4 + 6 - 2 \\
\Rightarrow && x &= 10 - 2 \\
\Rightarrow && x &= 8 
\end{align*}