$x+3$
Final Answer: The solution to the equation \(x + 3 = 0\) is \(\boxed{-3}\)
Step 1 :The question seems to be incomplete. It's an algebraic expression, not an equation. To solve for x, we need an equation. If the question is to solve for x in the equation \(x + 3 = 0\), then we can proceed.
Step 2 :Solving the equation gives \(x = -3\)
Step 3 :Final Answer: The solution to the equation \(x + 3 = 0\) is \(\boxed{-3}\)