a, 2\(x\) + 4 - 5\(x\) = -11
-(5\(x\) - 2\(x\)) + 4 = -11
-3\(x\) + 4 = -11
3\(x\) = 11 + 4
3\(x\) = 15
\(x\) = 15 : 3
\(x\) = 5
b, \(x\) - (-5) = 8
\(x\) + 5 = 8
\(x\) = 8 - 5
\(x\) = 3
c, (\(x\) + 2)2 = 25
\(\left[{}\begin{matrix}x+2=5\\x+2=-5\end{matrix}\right.\)
\(\left[{}\begin{matrix}x=3\\x=-7\end{matrix}\right.\)
d, 2(\(x-12\)) + 13 = \(x\) + (-14)
2 \(x\) - 24 + 13 = \(x\) - 14
2 \(x\) - 11 = \(x\) - 14
2\(x\) - \(x\) = - 14 + 11
\(x\) = -3