\(\Rightarrow-1.2x=6.3=18\\ \Rightarrow2x=18:\left(-1\right)\\ \Rightarrow2x=-18\\ \Rightarrow x=-18:2\\ \Rightarrow x=-9\)
\(\dfrac{-1}{6} = \dfrac{3}{2x}\)
\(=> \) \(-1 . 2x = 3 . 6 \)
\(=> 2x = \dfrac{ 3 . 6}{ -1 }\)
\(=> 2x = -18 \)
\(=> x = \dfrac{ -18 }{2}\)
\(=> x = 9 \)
Vậy x = 9