[
  "The age gap never changes. Use a bar model: Son now = 1 unit, Mrs Mariam now = 44 - 1 unit.",
  "Six years from now: Son = 1 unit + 6, Mrs Mariam = 50 - 1 unit. Set 50 - 1 unit = 3 x (1 unit + 6). Solve: 4 units = 32, so 1 unit = 8 (Son now).",
  "Mrs Mariam now = 44 - 8 = 36. Answer: 36 years old."
]