How to simplify algebra expressions

$$\underset{\,\,\,\,{\textcolor[rgb]{0.66,0.66,0.66}{\rightarrow {\mathtt{x}}}}}{{solve}}{\left(\begin{array}{l}{\mathtt{8}}{\mathtt{\,\small\textbf+\,}}{\mathtt{x}}={\mathtt{16}}\\ {\mathtt{x}}={\mathtt{16}}{\mathtt{\,-\,}}{\mathtt{8}}\\ {\mathtt{x}}={\mathtt{8}}\end{array}\right)}$$

Hii what do you mean? Pls specify which kinds:)

Do you want this solution explained ?