It appears the calculated values for angle $x$ contain complex numbers, which suggests that the setup might have numerical issues. Let's check the consistency of the inputs, as the values provided may not form a valid triangle.

Using the Law of Sines to check if such a triangle is possible, one critical consideration is that the sum of angles in any triangle must be less than 180°. Since angle $76^\circ$ is already significant, let's recheck the geometry or inputs, particularly the given side lengths.

Could you confirm if the side lengths and angles provided are correct? Would you like a detailed explanation of this issue or explore a new approach?