9 ) (x- 2022 ) . 30 = 0

`(x - 2022) . 30 = 0`

`=> x . 30 - 2022 . 30 = 0`

`=> 30x - 60660 = 0`

`=> 30x = 0 + 60660`

`=> 30x = 60660`

`=> x = 60660 : 30`

`=> x = 2022`

Vậy `x = 2022`

$\text{#maingoctranthi}$