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.
To solve the equation −3x−9=−21, we can follow these steps:
1. Start with the equation: −3x−9=−21
2. Move the constant term (-9) to the right side by adding 9 to both sides of the equation:
-3x - 9 + 9 = -21 + 9
-3x = -12
3. Divide both sides of the equation by -3 to isolate x:
-3x / -3 = -12 / -3
x = 4
So the completed solution is:
-3x = -12
x = 4