Since 26x-13 contains both numbers and variables, there are two steps to find the GCF. Find the GCF for the numeric part, then find the GCF for the variable part.
Steps to find the GCF for 26x-13:
1. Find the GCF for the numerical part 26-13
2. Find the GCF for the variable part
3. Multiply the values together
Find the common factors for the numerical part:
26,-13
The factors for 26 are 1, 2, 13, 26
The factors for -13 are 1, 13
List all the factors for 26, -13 to find the common factors
26:1, 2, 13, 26
-13: 1, 13
The common factors for 26, -13 are 1, 13
The numbers do not contain any common variable factors. The GCF of the numerical factors 1, 13 is 13.