Answer:
Please see below.
Explanation:
Original equation:
2x - y = 5
If you were to move the 2x to the other side of the equation, y would still be negative.
-y = -2x + 5
Now, if you wanted y to be positive, you would divide both sides by -1.
y = 2x - 5
Please let me know if I'm incorrect and I'll edit the question :)