For this case we have that by definition, the GFC or greater common factor of two numbers, is the greater number that is a factor of both numbers.
So, if we have:
The GFC of both will be number 8:
The 8 is the largest number that divides both.
Answer:
8
Step-by-step explanation:
8x
40=8*5
The greatest common factor of 8x and 40 is 8