Answer:
y=5
or
y=25/2
depending on what you meant by the question
Step-by-step explanation:
Do you mean 2y, or y^2? I'll solve both ways I guess
If you meant 2y:
2y-25=0
Add 25 to the other side
2y=25
divide both sides by two
y=25/2
if you meant y squared:
y^2-25=0
add 25 to the other side
y^2=25
take the square root of both sides
y=5