input: from typing import List
  
  def linear_eq(a: int, b: int, c: int, x: int, y: int) -> int:
      """Calculate the objective function of a linear equation given the coefficients and variables.
      The equation is in the form: ax + by = c.
      This function returns the result of the objective function a*x + b*y - c.
      >>> linear_eq(3, 5, 7, 1, 1)
      1
      >>> linear_eq(3, 5, 7, 2, 3)
      14
      """
      return a*x + b*y - c
output:     return a*x + b*y - c