HELP ME PLEASE IM DUMB

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers