`3x - 5 = 22`
$\Rightarrow$ `3x = 22 + 5`
$\Rightarrow$ `3x = 27`
$\Rightarrow$ `x = 27 : 3`
$\Rightarrow$ `x = 9`
$\text{Vậy}$ `x = 9`
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`18 - 2x = 14`
$\Rightarrow$ `2x = 18 - 14`
$\Rightarrow$ `2x = 4`
$\Rightarrow$ `x = 4 : 2`
$\Rightarrow$ `x = 2`
$\text{Vậy}$ `x = 2`