Find th GCF of 42m - 28n

To find the greatest common factor (GCF) of 42m - 28n, we need to find the largest expression that can be factored out of both terms.

Step 1: Factor out the common factor.
In both terms, we can factor out 14:
42m = 14 * 3 * m
28n = 14 * 2 * n

Step 2: Determine the greatest common factor.
The GCF is the product of the common factors raised to the lowest power. In this case, the common factor is 14, and it is raised to the power of 1 (since it appears in both terms). Therefore, the GCF of 42m - 28n is 14.