Assuming this is the correct equation:
(x-5)/x = 25/(x+5)
Note that x ≠ 0, -5.
Multiply both sides by x(x+5):
x(x+5)(x-5)/x = 25x(x+5)/(x+5)
(x+5)(x-5) = 25x
x^2 - 25 = 25x
x^2 - 25x - 25 = 0
b^2 - 4ac = 25*25 + 4(25) = 25(25+4) = 25*29
x = 25/2 ± 5√(29)/2
x ≈ 25.96291201783626, -0.96291201783626 ≈ 26, -1
Closest answer is B.