-10-|5-x|=-12
|5-x|=-10-(-12)
|5-x|=2
TH1: 5-x=2
=> x=3
TH2 : 5-x=-2
=> x=7
Vậy x=3 hoặc x=7
-10 - |5 - x| = -12
|5 - x| = -12 + (-10)
|5 - x| = -2 ⇒ \(\left\{{}\begin{matrix}TH1:5-x=2\Rightarrow5-2=3\\\\\\TH2:-5-x=2\Rightarrow-5-2=-3\end{matrix}\right.\)
Vậy : x = 3 hoặc x = -3