Answer:
x = -4
Step-by-step explanation:
x - 16 = -20
16 is being subtracted from x. To get x alone, you need to add 16 to x - 16.
We must do the same to both sides of an equation, so we add 16 to both sides of the equation.
x - 16 + 16 = -20 + 16
x = -4
