To solve the equation -3x - 9 = -21, we need to isolate the variable x.
To do this, we can start by adding 9 to both sides of the equation:
-3x - 9 + 9 = -21 + 9
Simplifying both sides gives us:
-3x = -12
To isolate x, we can divide both sides of the equation by -3:
(-3x) / -3 = (-12) / -3
Simplifying gives us:
x = 4
So the solution to the equation -3x - 9 = -21 is x = 4.
The equation −3x−9=−21
is solved as follows. Supply the correct numbers to complete the solution.
1 answer