he 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.
−3x−9=−21
To find the value of −3x:
−3x = −21 + 9
−3x = -12
To find the value of x:
x = -12 / -3
x = 4
To solve the equation -3x - 9 = -21, you can follow these steps:
1. Start with the given equation: -3x - 9 = -21.
2. To isolate the variable, begin by getting rid of the constant term on the left side of the equation. You can do this by adding 9 to both sides: -3x - 9 + 9 = -21 + 9.
3. Simplify both sides: -3x = -12.
4. Now, divide both sides of the equation by -3 to solve for x: (-3x)/-3 = -12/-3.
5. Simplify further: x = 4.
Therefore, the completed solution is:
-3x - 9 = -21
-3x = -12
x = 4
To solve the equation −3x − 9 = −21, we need to isolate the variable x.
First, let's begin by getting rid of the constant term (-9) on the left side. To do this, we can add 9 to both sides of the equation:
−3x − 9 + 9 = −21 + 9
This simplifies to:
−3x = -12
Next, we want to isolate the variable x. To do this, we need to divide both sides of the equation by the coefficient of x, which is -3:
(-3x) / -3 = -12 / -3
This simplifies to:
x = 4
Therefore, the correct numbers to complete the solution are -12 when adding 9 to both sides and 4 when dividing both sides by -3.