Find the value of x for the Hexagon

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

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Generate two equivalent fractions for each fraction. use fraction tiles or number lines . 3/4