|2x+1|+5=12 solve for x

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

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.