M. N is a natural number, M / 1-N / 1 = 273 / 1, M: n = 7:13, what is the sum of M and N

M. N is a natural number, M / 1-N / 1 = 273 / 1, M: n = 7:13, what is the sum of M and N

Let m be 7K, then n is 13K. Substituting into 3, we can get k = 18, ∧ M = 126, n = 234. Pay attention to mark the score line in the future