When will inequality change its sign? for example -X is greater than or equal to - 9 Is it a success X is less than or equal to 3?

When will inequality change its sign? for example -X is greater than or equal to - 9 Is it a success X is less than or equal to 3?

-x²≥-9
X & # 178; ≤ 9.. divide left and right by - 1, multiply and divide negative numbers by sign
-3≤x≤3