giúp e với ạ
a, đk : x >= -2
\(\left[{}\begin{matrix}2x+1=x+2\\2x+1=-x-2\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1\\3x=-3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1\\x=-1\end{matrix}\right.\)(tm)
b, đk : x >= -3
\(\left[{}\begin{matrix}-2x=x+3\\-2x=-x-3\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}-3x=3\\-x=-3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-1\\x=3\end{matrix}\right.\)(tm)
c, đk : x =< 5/3
\(\left[{}\begin{matrix}x-4=5-3x\\x-4=3x-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}4x=9\\2x=1\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{9}{4}\left(ktm\right)\\x=\dfrac{1}{2}\end{matrix}\right.\)
huhu giúp e với ạ e cần gấp ạ
