Question Number 105120 by Josias last updated on 26/Jul/20
$${f}\left(\mathrm{2}{f}\left({x}\right)+{f}\left({y}\right)\right)=\mathrm{2}{x}+{y}\:\:\:{f}:\mathbb{R}\rightarrow\mathbb{R} \\ $$$${f}\left({x}\right)=?\:\:\:\:{x},{y}\in\mathbb{R} \\ $$$$ \\ $$
Answered by SUMIT007 last updated on 26/Jul/20
$${f}\left({x}\right)={x}\:\:\:\:\mathrm{simple} \\ $$