|x+1,2|-|2,4-x|=0
=>\(\left|x+1,2\right|=\left|2,4-x\right|\)
=>\(\left[{}\begin{matrix}x+1,2=2,4-x\\x+1,2=x-2,4\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x+x=2,4-1,2\\0x=-3,6\left(loại\right)\end{matrix}\right.\)
=>2x=1,2
=>\(x=1,2:2=0,6\)