a, Ta có : \(x-5=-1\)
\(\Leftrightarrow x=\left(-1\right)+5\)
\(\Rightarrow x=4\)
Vậy \(x=4\)
b, Ta có :\(x+30=-4\)
\(\Leftrightarrow\left(-4\right)-30\)
\(\Leftrightarrow x=\left(-34\right)\)
Vậy \(x=\left(-34\right)\)
c, Ta có : \(x-\left(-24\right)=3\)
\(x=3+\left(-24\right)\)
\(\Leftrightarrow x=\left(-21\right)\)
Vậy \(x=\left(-21\right)\)
d,Ta có : \(22-\left(-x\right)=12\)
\(\Leftrightarrow\left(-x\right)=22-12\)
\(\Leftrightarrow\left(-x\right)=10\)
Vậy ....
e,Ta có : \(\left(x+5\right)+\left(x-9\right)=x+2\)
\(\Leftrightarrow\left(x+5\right)+x-9=x+2\)
\(\Leftrightarrow x+5-9=2\)
\(\Leftrightarrow x-4=2\)
\(\Leftrightarrow x=2+4\)
\(\Rightarrow x=6\)
Vậy x=6