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2025 AIME I Question 8

AIME · 2025 AIME I

Question 8

Let $k$ be a real number such that the system $$
|25 + 20i - z| = 5
$$ $$
|z - 4 - k| = |z - 3i - k|
$$ has exactly one complex solution $z.$ The sum of all possible values of $k$ can be written as $\frac{m}{n},$ where $m$ and $n$ are relatively prime positive integers. Find $m + n.$ Here $i = \sqrt{-1}.$