You need to find the length of a segment that’s congruent to FN like HN. Use the Pythagorean Theorem (a^2 + b^2 = c^2).
24^2 + b^2 = 25^2
576 + b^2 = 625
(Subtract 576 from both sides)
b^2 = 49
(Square root both sides)
b = 7
So HN = 7 and since FN has the same length you would do 14x =7
(aka equaling them to each other)
(Divide both sides by 14)
And you should get x = 0.5
I’m pretty sure that’s how you’d solve it