Question

Giải phương trình sau /2x/=4x+18

Answer 1

2x=4x+18

=>2x-4x=18

=>-2x=18

=>x=18:(-2)

=> x= -9

Chúc cậu may mắn 

Answer 2

\(|2x|=4x+18\\\leftrightarrow 2x=4x+18\quad or\quad 2x=-4x-18\\\leftrightarrow -2x=18\quad or\quad 6x=-18\\\leftrightarrow x=-9\quad or\quad x=-3\)

Answer 3

Ta có: \(\left|2x\right|=4x+18\)

\(\Leftrightarrow\left[{}\begin{matrix}2x=4x+18\\-2x=4x+18\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}2x-4x=18\\-2x-4x=18\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}-2x=18\\-6x=18\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-9\\x=-3\end{matrix}\right.\)

Vậy: \(x\in\left\{-9;-3\right\}\)