Question

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

Add 9 to both sides.
x=

Divide both sides by −3
.

Answer 1

12 is wrong

Answer 2

Let's solve the equation step-by-step and fill in the blanks accordingly.

Starting with the equation:

\[
-3x - 9 = -21
\]

1. **Add 9 to both sides:**

\[
-3x - 9 + 9 = -21 + 9
\]

This simplifies to:

\[
-3x = -12
\]

So, the first blank is:

\[
-3x = -12
\]

2. **Now, divide both sides by -3:**

\[
x = \frac{-12}{-3}
\]

This simplifies to:

\[
x = 4
\]

So, the second blank is:

\[
x = 4
\]

Putting it all together, the completed solution is:

\[
-3x - 9 = -21
\]
\[
-3x = -12
\]
\[
x = 4
\]