Theorem 1. Let a Diophantine equation (x-a)n(xn-yn)=bnxn. If n>2 then the equation has no a solution; if n<=2 then the equation has the solution.
Theorem 2. Let the Diophantine equation (x-a)n(xn+yn)=bnxn. If n>2 then the equation has no the solution; if n=1 then the equation has the solution; if n=2 then the equation has the solution in the case without when there exists r natural number and 4k+3 kind of prime number p|b such that p2r-1|b and p2r|b (where the solution has not).
Emzari Papava
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