Answer:
1, in which x = 0.
Explanation:
First, combine 8x and 4x to get 12x.
Now, we have 12x = 0.
We know that if the product of two numbers is equal to 0, at least one of them must be 0.
12 is not equal to 0, so x must be equal to 0.
Therefore, x = 0, and that is the only solution.