The equation -3x -9 =-21 is solve as follows supply the correct numbers to complete the solution

-3x -9 =-21
-3=? Add 9 to both sides
X=? Divide both sides by -3

1 answer

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

-3x - 9 + 9 = -21 + 9

Simplifying, we get:

-3x = -12

Next, we can divide both sides of the equation by -3 to solve for x:

-3x / -3 = -12 / -3

Simplifying, we get:

x = 4

Therefore, the solution to the equation -3x - 9 = -21 is x = 4.