Final answer:
The possible solutions for y in the equation x - y = 0 are y = -x.
Step-by-step explanation:
The equation x - y = 0 represents a linear equation. To find the possible solutions for y, we need to isolate y on one side of the equation. Adding y to both sides gives us x - y + y = 0 + y, which simplifies to x = y. This means that any value of y that is equal to x will satisfy the equation. Therefore, the possible solutions for y in the equation x - y = 0 are y = -x.