How did the Louisiana Purchase Territory impact slavery? Why did Congress want to keep the number of slave states and free states balanced in the U.S?

No one here will write your assignment for you. However, if you post what you write (no rough drafts, please), someone may be able to critique your thinking and writing for you.

Read many of the articles here (if you haven't already found the info you need in your text):
https://www.google.com/search?q=Louisiana+Purchase+Territory+impact+slavery&oq=Louisiana+Purchase+Territory+impact+slavery&aqs=chrome..69i57j69i60.5238j0j7&sourceid=chrome&ie=UTF-8

And I hope you paid attention to the replies to your earlier demands.