You are planning to make a scrapbook. The album costs $20 and each of the scrapbook papers cost an additional $1. Write an equation that represents the cost of the completed scrapbook where x represents the number of scrapbook papers you purchase.
Step-by-step explanation: Let x be the number of scrapbook pages and 20 be the starting value, since the album starts at $20. Then, for every page, a dollar is added. The following equation is the result.