To solve this equation:

First, convert 2 1/2 to an improper fraction:
2 1/2 = 5/2

Now, rewrite the equation with the improper fraction:
20/(x+20) + 20/(20-x) + 25/60 = 5/2

Next, find a common denominator for the fractions on the left side of the equation:
The common denominator is 60.

Rewrite the equation with the common denominator:
(6020)/(60(x+20)) + (6020)/(60(20-x)) + 25/60 = 5/2
1200/60(x+20) + 1200/60(20-x) + 25/60 = 5/2

Now, simplify the equation by multiplying out the numerators:
20(x+20) + 20(20-x) + 25 = 1500

Expand the terms:
20x + 400 + 400 - 20x + 25 = 1500

Combine like terms:
825 = 1500

This is not a true statement, so there is no solution to the equation.

Therefore, the solution to the original equation is no solution.