To solve the equation, we need to isolate the variable "a".

First, we can start by adding 5 to both sides of the equation to get rid of the -5:

√(a - 5) + 5 = 25 + 5

Simplifying this equation gives us:

√(a - 5) + 5 = 30

Next, we can subtract 5 from both sides of the equation to isolate the square root term:

√(a - 5) = 30 - 5

Simplifying further:

√(a - 5) = 25

To eliminate the square root, we square both sides of the equation:

(√(a - 5))^2 = 25^2

Simplifying this equation gives us:

a - 5 = 625

Finally, we can solve for "a" by adding 5 to both sides of the equation:

a = 625 + 5

Simplifying further:

a = 630

Therefore, the solution to the equation √(a - 5) = 25 is a = 630.