function x = p13_sol ( )

%*****************************************************************************80
%
%% p13_sol() returns the solution for problem 13.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    04 August 2019
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    real x, the solution.
%
  x = -1.419229002336325;

  return
end
