To solve the equation $x + 4 = 8$, we need to isolate $x$.

1. Subtract 4 from both sides of the equation: $x + 4 - 4 = 8 - 4$

2. Simplify: $x = 4$

So, the solution is $x = 4$.

Would you like more details or have any questions? Here are some questions you might want to ask next:

1. How do you solve equations with variables on both sides?
2. What are the steps to solve quadratic equations?
3. Can you explain how to solve systems of linear equations?
4. How do you factor polynomials?
5. What is the quadratic formula and how is it used?

Tip: When solving linear equations, always perform the same operation on both sides of the equation to maintain balance.