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

1 answer

We need to solve the equation -3x - 9 = -21.

First, let's isolate the variable by moving the constant term to the other side of the equation.

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

Simplifying, we have:

-3x = -12

To solve for x, we divide both sides of the equation by -3:

(-3x) / -3 = (-12) / -3

The negative signs on both sides cancel out, giving us:

x = 4

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