An equation and the steps to solve it are shown below
3x-1/2 (8x-2)=4
step 1: 3x-4x+1=4
step 2: x+1=4
step 3: x+1-1=4-1
step 4: x=3
which step was the error made and why?

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