To solve for \( y \) in the equation \( 2x - y = 6 \), we can isolate \( y \) on one side of the equation.
Starting with the original equation:
\[ 2x - y = 6 \]
We can add \( y \) to both sides:
\[ 2x = y + 6 \]
Now, we subtract 6 from both sides to isolate \( y \):
\[ y = 2x - 6 \]
So, the correct answer is:
\[ y = 2x - 6 \]