To solve for y in the equation 5y - 10 = -25, we need to isolate the variable y.
First, we add 10 to both sides of the equation:
5y - 10 + 10 = -25 + 10
This simplifies to:
5y = -15
Next, we divide both sides of the equation by 5 to solve for y:
5y/5 = -15/5
y = -3
So the solution to the equation is y = -3.