Řeš v \( \mathbb{R} \) rovnici:
\( |9-x|=2|1+3 x| \)
\( K=\left\{-\frac{11}{5} ; 0\right\} \)
\( K=\left\{-\frac{11}{5} ; 2\right\} \)
\( K=\left\{-\frac{11}{5} ; 1\right\} \)
\( K=\left\{-\frac{9}{5} ; 1\right\} \)
