If x and y are positive integers, which of the following CANNOT be the greatest common divisor of 35x and 20y?
5(x – y)
I think its C
A: obvs can be.
B: x=2 and y=1 5x-5y=5 then and it can be a common a GCF
D: what if 35x=20y
E: what if 35x=20y
Now obvs 20x cannot equal 35x. This is where I gathered that the answer is C. I am not certain here.