isabelle/valid/mathd_numbertheory_42.thy (16 lines of code) (raw):
(*
Authors: Wenda Li
*)
theory mathd_numbertheory_42
imports Complex_Main "HOL-Computational_Algebra.Computational_Algebra"
begin
theorem mathd_numbertheory_42:
fixes u v :: nat
assumes "27 * u mod 40 = 17"
and "27 * v mod 40 = 17"
and "u < 40"
and "v < 80"
and "40 < v"
shows "(u + v) = 62"
sorry
end