`a)`
`|x+1/2| - 4/5 = 0`
` | x + 1/2 | - 4/5 = 0`
`| x + 1/2| = 0 + 4/5`
`| x + 1/2| = 4/5`
\(\left[ \begin{array}{l}x+\frac{1}{2} = \frac{4}{5} \\x+\frac{1}{2} = \frac{-4}{5}\end{array} \right.\)
\(\left[ \begin{array}{l}x=3\\x=\frac{-13}{14}\end{array} \right.\)
`b)`
`|x-1,2|.5 = 0`
`x- 1,2 . 5 = 0`
`x= 0: 5 +1,2`
`x = 1,2`
`c)`
`|1/2 - x|-1/2 =0`
`|x - 1/2| = 1/2 - 0`
`|x - 1/2 | = 1/2`
\(\left[ \begin{array}{l}x -\frac{1}{2 } =\frac{1}{2}\\x -\frac{1}{2 } =\frac{-1}{2}\end{array} \right.\)
\(\left[ \begin{array}{l}x=1\\x=0\end{array} \right.\)
`d)`
`|3 - x| . 7 = 0`
`|3 -x| = 0 :7`
`|3 - x| = 0`
`3 - x =0`
`x = 3 -0`
`x = 3`
