`{[(2x + 14) : 2^{2} - 3] : 2 } - 1 = 0`
$\Rightarrow$ `{[(2x + 14) : 2^{2} - 3] : 2 } = 0 + 1`
$\Rightarrow$ `[(2x + 14) : 4 - 3] : 2 = 1`
$\Rightarrow$ `[(2x + 14) : 4 - 3] = 1 . 2`
$\Rightarrow$ `(2x + 14) : 4 - 3 = 2`
$\Rightarrow$ `(2x + 14) : 4 = 2 + 3`
$\Rightarrow$ `(2x + 14) : 4 = 5`
$\Rightarrow$ `(2x + 14) = 5 . 4`
$\Rightarrow$ `2x + 14 = 20`
$\Rightarrow$ `2x = 20 - 14`
$\Rightarrow$ `2x = 6`
$\Rightarrow$ `x = 6: 2`
$\Rightarrow$ `x = 3`
$\text{Vậy}$ `x = 3`
