a, \(\left|x\right|=18\)
\(\Rightarrow x\left[{}\begin{matrix}18\\-18\end{matrix}\right.\)
b, \(2x+17=3\)
\(\Rightarrow\) \(2x\) \(=3-17\)
\(\Rightarrow\) \(2x\) \(=-14\)
\(\Rightarrow\) \(x\) \(=-14\div2\)
\(\Rightarrow\) \(x\) \(=-7\)
c, \(-5< x< 3\)
\(\Rightarrow x\left\{-4;-3;-2;-1;1;2\right\}\)
d, \(\left|x\right|=\left|-7\right|\)
\(\Rightarrow\left|x\right|=7\)
\(\Rightarrow x\left[{}\begin{matrix}7\\-7\end{matrix}\right.\)
e, \(5-\left(-7\right)=x+7\)
\(12\) \(=x+7\)
\(\Rightarrow\) \(x\) \(=12-7\)
\(\Rightarrow\) \(x\) \(=5\)
