Noelle + Dad = 62 N + D = 62 || N + (3N-6) = 62 N + 3N - 6 = 62 4N = 62 + 6 = 68 ====> N = = 17. Answer. Noelle is 17 years old. The age of Noelle's dad is 3*17-6 = 45 years.