It seems like you're asking to solve for $x(t)$, but I need more context or an equation to work with. If you have an equation where you'd like to arrive at $x(t) = 4 + 5t$, could you please provide it?

Once you do, I'll guide you through solving it.

Let me know if you'd like to upload a photo or describe the equation. Would you like more details? Here are 5 relative questions for further exploration:

1. What is the initial condition of $x(t)$?
2. Are there any differential equations involved in obtaining $x(t) = 4 + 5t$?
3. What is the significance of the constants 4 and 5 in this function?
4. Are you working with any specific physical systems or models for $x(t)$?
5. Is this related to a boundary value problem?

Tip: When solving differential equations, always consider integrating constants carefully if there are any initial conditions.