`d)` `7/6` `-` `|x-1/4|` `=` `2/3`
`⇔` `|x-1/4|` `=` `7/6` `-` `2/3`
`⇔` `|x-1/4|` `=` `1/2`
`⇔` `x` `-` `1/4` `=` `1/2` hoặc `x` `-` `1/4` `=` `-1/2`
`+)` `x` `-` `1/4` `=` `1/2`
`⇔` `x` `=` `1/2` `+` `1/4`
`⇔` `x` `=` `3/4`
`+)` `x` `-` `1/4` `=` `-1/2`
`⇔` `x` `=` `-1/2` `+` `1/4`
`⇔` `x` `=` `-1/4`
$\text{Vậy .....}$
`e)` `(3/5+1/2.x)^2` `=` `1/9`
`⇔` `(3/5+1/2.x)^2` `=` `(1/3)^2`
`⇔` `3/5` `+` `1/2x` `=` `1/3`
`⇔` `1/2x` `=` `1/3` `-` `3/5`
`⇔` `1/2x` `=` `-4/15`
`⇔` `x` `=` `-8/15`
$\text{Vậy .....}$
`f)` `(x+4/3)^3` `=` `1/27`
`⇔` `(x+4/3)^3` `=` `(1/3)^3`
`⇔` `x` `+` `4/3` `=` `1/3`
`⇔` `x` `=` `1/3` `-` `4/3`
`⇔` `x` `=` `-1`
$\text{Vậy .....}$
