Решим уравнение:
$$ (x + 23)^2 = (32 - x)^2 $$
$$ x^2 + 46x + 529 = 1024 - 64x + x^2 $$
$$ x^2 - x^2 + 46x + 64x + 529 - 1024 = 0 $$
$$ 110x - 495 = 0 $$
$$ 110x = 495 $$
$$ x = \frac{495}{110} = \frac{99}{22} = \frac{9}{2} = 4,5 $$
Ответ: 4.5