first, make an equation:

then, add twelve to both sides to remove it from the right:

then just divide by (-3) to get the value of x:

Answer:
X = 0.8
Step-by-step explanation:
reorder the terms by moving all terms that contain X to the left, and all the others to the right.
add 2X to both sides
Combine like terms
add (-5) to both sides
combine like terms
divide both sides by 5
-36 one of many possible answers.