Question

giúp mình câu này với ghi rõ luôn ạ

Answer 1

\(\dfrac{-3x-18+5x-10}{-15}-2\ge0\)

\(\Leftrightarrow\dfrac{2x-28+30}{-15}\ge0\Leftrightarrow\dfrac{2x+2}{-15}\ge0\)

\(\left\{{}\begin{matrix}2x+2< 0\\2x+2\ne0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x< -1\\x\ne-1\end{matrix}\right.\)