Final answer:
The correct solution for the equation (5x^4 + x) - y = 0 is y = 5x^4 + x, which corresponds to option B.
Step-by-step explanation:
The solution to the given equation (5x^4 + x) - y = 0 is to isolate the variable y on one side of the equation. This can be done by simply adding y to both sides to get y by itself on the right side, resulting in the equation y = 5x^4 + x. Therefore, the correct answer from the provided options is B) y = 5x^4 + x.