Giải thích các bước giải:
`13-|x|=|-4|`
`⇔13-|x|=4`
`⇔|x| = 13 - 4`
`⇔|x| = 9`
`⇒`` |x | = ± 9`
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`|x|-3+6 =16`
`⇔|x| = 16 - 6 + 3`
`⇔ |x| = 13`
`⇒ | x| = ± 13`
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`35-|2x-1|=14`
`⇔|2x-1| = 35 - 14`
`⇔|2x - 1| = 21`
`⇔` \(\left[ \begin{array}{l}2x - 1 = 21\\2x - 1 = - 21\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}2x = 22\\2x = -20\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=11\\x=-10\end{array} \right.\)
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`|3x-2|+5=9-1`
`⇔ |3x-2|+5= 8 `
`⇔ |3x-2| = 8 -5`
`⇔|3x - 2 | = 3`
`⇔` \(\left[ \begin{array}{l}3x -2 = 3\\3x - 2 = -3\end{array} \right.\)
`⇔` \(\left[ \begin{array}{l}3x = 5\\3x=-1\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x = \frac{3}{5}\\x = \frac{-1}{3}\end{array} \right.\)
