Řeš v \( \mathbb{R} \) rovnici:
\( 3 x-\frac{1}{2}(4-8 x)=9 \)
\( K=\left\{\frac{12}{7}\right\} \)
\( K=\left\{\frac{10}{7}\right\} \)
\( K=\left\{\frac{11}{8}\right\} \)
\( K=\left\{\frac{11}{7}\right\} \)
