Use the Pythagorean theorem to find x.
a² + b² = c², where a and b are the legs and c is the hypotenuse.
Plug in 22 for a, x for b, and 25 for c.
22² + x² = 25²
484 + x² = 625
Subtract 484 from both sides.
x² = 141
Square root both sides.
x = √141
