Đáp án+Giải thích các bước giải:
`a)|x – 5| = 3`
`<=>`\(\left[ \begin{array}{l}x-5=3\\x-5=-3\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=8\\x=2\end{array} \right.\)
`b) |1 – x| = 7`
`<=>`\(\left[ \begin{array}{l}1-x=7\\1-x=-7\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=-6\\x=8\end{array} \right.\)
`c) |2x + 5| -14 = -13`
`<=>|2x+5|=1`
`<=>`\(\left[ \begin{array}{l}2x+5=1\\2x+5=-1\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=-2\\x=-3\end{array} \right.\)
`d) 26 - |x + 9| = -13`
`<=>|x+9|=39`
`<=>`\(\left[ \begin{array}{l}x+9=39\\x+9=-39\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=30\\x=-48\end{array} \right.\)
`e) 26 – 2.|x + 9| = 36`
`<=>2|x+9|=-10`
`<=>|x+9|=-5`
`<=>`\(\left[ \begin{array}{l}x+9=-5\\x+9=5\end{array} \right.\)
`<=>`\(\left[ \begin{array}{l}x=-14\\x=-4\end{array} \right.\)
