To solve the equation -3x-9=-21, we can follow these steps:
Step 1: Start with the equation -3x-9=-21.
Step 2: Add 9 to both sides of the equation to isolate the term with x. It becomes:
-3x - 9 + 9 = -21 + 9
Simplifying, we have:
-3x = -12
Step 3: To solve for x, divide both sides of the equation by -3:
(-3x) / -3 = (-12) / -3
Simplifying, we get:
x = 4
Therefore, the value of x that satisfies 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
-3x=? add 9 to both sides
x=? divide both sides by -3
1 answer