a) \(150:\left(x-5\right)=-5\Leftrightarrow x-5=150:\left(-5\right)=-30\Leftrightarrow x=-25\)
KL:.......................
b) \(2x+11=\left(-3\right)^3:3\Leftrightarrow2x=-3^2-11=-9-11=-20\Leftrightarrow x=-10\)
KL:...............................
c) \(\left(x-15\right)+\left|5\right|=-10\Leftrightarrow x-15=-10-\left|5\right|=-10-5=-15\Leftrightarrow x=0\)KL:................................
d) \(\left|2x-3\right|-4=1\Leftrightarrow\left|2x-3\right|=5\Leftrightarrow\left[{}\begin{matrix}2x-3=5\\2x-3=-5\end{matrix}\right.\)\(\Leftrightarrow\left[{}\begin{matrix}x=4\\x=-1\end{matrix}\right.\)
KL:................
Bài 2: \(\left|x-3\right|\ge0\forall x\Rightarrow A=\left|x-3\right|+11\ge11\forall x\)
\(\Rightarrow MinA=11\Leftrightarrow x-3=0\Leftrightarrow x=3\)
KL:............
