To solve the equation 23 + 8x = 5x, you want to isolate the variable x. You can do this by moving all terms containing x to one side of the equation and constants to the other side. Here’s how to solve it step by step:

1. Start with the given equation:
   23 + 8x = 5x
2. To isolate the x terms on one side, subtract 5x from both sides of the equation:
   23 + 8x – 5x = 5x – 5x
   This simplifies to:
   23 + 3x = 0
3. Now, to isolate x, subtract 23 from both sides of the equation:
   23 – 23 + 3x = 0 – 23
   This simplifies to:
   3x = -23
4. Finally, divide both sides by 3 to solve for x:
   (3x) / 3 = (-23) / 3
   This simplifies to:
   x = -23 / 3

So, the solution to the equation is:
x = -23 / 3
You can leave it as a fraction or convert it to a decimal if needed.