`h)`
`|x + 1/3| - 3/4 = 7/12`
`⇒ |x + 1/3| = 7/12 + 3/4 = 16/12 = 4/3`
`⇒` \(\left[ \begin{array}{l}x + 1/3 = 4/3\\x + 1/3 = -4/3\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x = 1\\x = -5/3\end{array} \right.\)
`Vậy S = {1 ; -5/3}`
`k)`
`2^x + 2^(x + 3) = 144`
`⇒ 2^x + 2^x . 2^3 = 144`
`⇒ 2^x . (1 + 8) = 144`
`⇒ 2^x = 16 = 2^4`
`⇒ x = 4`
`Vậy S = {4}`