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Found problems: 1

2018 Bosnia And Herzegovina - Regional Olympiad, 2
Determine all triplets $(a,b,c)$ of real numbers such that sets $\{a^2-4c, b^2-2a, c^2-2b \}$ and $\{a-c,b-4c,a+b\}$ are equal and $2a+2b+6=5c$. In every set all elements are pairwise distinct
equal sets set number theory algebra