What is the gcf of 20,45x
\(20=5\cdot4\\\\45x=5\cdot9x\\\\GCF(20;\ 45x)=5\)
To answer thegiven problem, the GCF of 20,45x is 5. I am hoping that this answer hassatisfied your query and it will be able to help you, and if you would like,feel free to ask another question.