what is the answer for -2y-5=-9?

Answer 1

-2y-5=-9

-2y - 5 + 5 = -9 + 5
-2y = -4
y = 2

To check it, substitute 2 for y in your original equation.

Answer 2

-2y-5=-9?

Move -5 to right side.
-2y=-9+5
combine terms on right side.
-2y=-4
divide both sides by 2
-2y/2 = -4/2
Can you take it from here?