Accepted Answer
[tex]12x=4x\cdot3\\\\44xy=4x\cdot11y\\\\GCF(12x;\ 44xy)=4x[/tex]
Accepted Answer
If we don't know what 'x' and 'y' are, the best we can say is that the GCF is 4x .But 'x' and 'y' can easily take on values that would change the GCF.