5x2=x+6\displaystyle 5x-2=x+6
5x2=x+6\displaystyle 5x-2=x+6
+2\displaystyle \vert+2

5x=x+8\displaystyle 5x=x+8
x\displaystyle \vert-x

4x=8\displaystyle 4x=8
:4\displaystyle \vert:4

x=2\displaystyle x=2


L={2}\displaystyle L=\{2\}