`x - 6 : 2 . (42 - 24 . 2 : 6 - 3) = 0`
$\Rightarrow$ `x - 6 : 2 . (42 - 48 : 6 - 3) = 0`
$\Rightarrow$ `x - 6 : 2 . (42 - 8 - 3) = 0`
$\Rightarrow$ `x - 6 : 2 . (34 - 3) = 0`
$\Rightarrow$ `x - 6 : 2 . 31 = 0`
$\Rightarrow$ `x - 3 . 31 = 0`
$\Rightarrow$ `x - 93 = 0`
$\Rightarrow$ `x = 0 + 93`
$\Rightarrow$ `x = 93`
$\text{Vậy}$ `x = 93`