The GCF is the biggest number that goes into all of the terms. The biggest coefficient for x and y multiplied together. The GCF in these answers is to the left of the parenthesis.
If you multiply the GCF into he parenthesis you will get the original equation. On the other hand, the biggest number that goes into all of the terms is 3x * 1y = 3xy
Now you know the GCF, multiply it out in both of those answers and pick the one that is the original equation
