Can someone guide me on how to do this (online school)
−9−3x=27

x= -12

Step-by-step explanation:

To solve this, we need to get the variable, x, by itself. To do this, preform the opposite of what is being done to the equation. Everything done to one side, needs to be done to the other.

-9 -3x =27

9 is negative, or being subtracted. To undo this, add 9 to both sides, since addition is the opposite of subtraction.

-9+9 -3x=27+9  

The -9 and +9 will cancel.

-3x=36

-3 and x are being multiplied. To undo this, divide both sides by -3, since division is the opposite of multiplication.

-3x/-3=36/-3

The -3s will cancel, so we are left with

x= -12