If I get my X visa in September but I will travel in November can it will be valid?

Zain, according to what I know, every unversity/school has a deadline for registration. If you can't arrive before the deadline, you should contact your school in advance and ask if you can come later. Besides, you should pay attention to the validity of your X type. Please do not make it expired. If so, you need to reapply one.