In this problem, we are asked to solve for the variable X in a set of angle equations. However, the third option contains a typographical error, which prevents us from accurately solving the equation. The correct expression should be (5x + 336)°, which would allow us to set up an equation based on the properties of angles. When solving angle equations, we typically use the fact that the sum of angles in a straight line is 180° or that angles around a point sum to 360°. In this case, we would need to clarify the correct expression to proceed with solving for X.