The equation -3x -9 = -21 is solved as follows

Question

-3x= ___, add 9 to hoth sides
X=____divide both sides by -3

Answer 1

Let's solve the equation step by step:

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

2. To isolate the term with x, add 9 to both sides: \[ -3x = -21 + 9 \]

   So, calculating the right side: \[ -3x = -12 \]

3. Now, we divide both sides by -3 to solve for x: \[ x = \frac{-12}{-3} \]

   Which simplifies to: \[ x = 4 \]

Putting it all together, the completed responses for your blanks are:

• -3x = -12, after adding 9 to both sides
• x = 4, after dividing both sides by -3.