To solve the equation -10 + 10/2 - y = 0, we can simplify it step by step:

First, we simplify 10/2 to get 5: -10 + 5 - y = 0.

Next, we combine like terms: -5 - y = 0.

To isolate y, we can add 5 to both sides of the equation: -5 - y + 5 = 0 + 5.

This simplifies to: -y = 5.

Finally, to solve for y, we multiply both sides of the equation by -1: -1 * -y = -1 * 5.

This gives us: y = -5.

Therefore, the solution to the equation -10 + 10/2 - y = 0 is y = -5.