find the gcf of 42m-28n

To find the greatest common factor (GCF) of 42m-28n, we can factor out any common terms from both 42m and 28n.

The factors of 42m are: 1, 2, 3, 6, 7, 14, 21, 42, m, 2m, 3m, 6m, 7m, 14m, 21m, and 42m.

The factors of 28n are: 1, 2, 4, 7, 14, 28, n, 2n, 4n, 7n, 14n, and 28n.

The common factors are 1, 2, 7, and 14.

Therefore, the GCF of 42m-28n is 14.