The equation - 3x - 9 = - 21 is solved as follows. Supply the correct numbers to complete the solution. (1 point)

Answer 1

The equation - 3x - 9 = - 21 can be solved as follows:

-3x - 9 = -21
Subtract 9 from both sides:
-3x = -12
Finally, divide both sides by -3:
x = 4