Problem - 278
Solve in integer: $36((xy+1)z+x)=475(yz+1)$
The answer is $(13, 5, 7)$.
The left side can be rewritten as $36((yz+1)x+z)$. Because $gcd(36, 475)=1$ and $gcd((yz+1)x+z, yz+1) = 1$, we conclude $yz+1 = \pm 36$ and $(yz+1)x + z=\mp 475$.