Question

The equation −3x−9=−21
−
3
𝑥
−
9
=
−
21

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

−3x=
−
3
𝑥
=
Add 9 to both sides.
x=
𝑥
=
Divide both sides by −3
−
3
.//.

Answer 1

To solve the equation \(-3x - 9 = -21\), we will go through it step-by-step and fill in the missing parts.

1. Start with the equation:
\[
-3x - 9 = -21
\]

2. **Add 9 to both sides**:
\[
-3x - 9 + 9 = -21 + 9
\]
This simplifies to:
\[
-3x = -12
\]

3. **Divide both sides by -3**:
\[
x = \frac{-12}{-3}
\]
This simplifies to:
\[
x = 4
\]

So the completed solution looks like this:

- Start with: \(-3x - 9 = -21\)
- Add 9 to both sides: \(-3x = -12\)
- Divide both sides by -3: \(x = 4\)