Answer:
x = -1
Step-by-step explanation:
Pre-Solving
We are given the following equation:
3x + 9 = 6
We want to solve it for x. To do that, we need to isolate x on one side.
Solving
To start, subtract 9 from both sides.
3x + 9 = 6
-9 -9
___________
3x = -3
Now, divide both sides by 3.
3x = -3
÷3 ÷3
___________
x = -1