input: def calculate_objective_function(a: int, b: int, x: float, y: float, c: int) -> float:
      """ Calculate the objective function for a given linear equation in the form ax + by = c.
      >>> calculate_objective_function(3, 5, 10, 6, 7)
      73.0
      >>> calculate_objective_function(4, 2, 8, 3, 10)
      66.0
      """
      return a * x + b * y - c
output:     return abs(a * x + b * y - c)