Solve the following system of equations. 2x + y = 3 x = 2y - 1

How to do this , and can some one explain

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

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract