Übersicht

`6-1/2x = 1+2x || -2x `

`6-5/2x = 1 || -6 `

`-5/2x = -5 || *(-2/5) `

`x=2 `

Probe:

`6-1/2*2 = 1+2*2 `

`6-1 = 5 `✔✔

`=> L={2} `