If you the same number on both sides of an equation, it will still have the same solution set. options: A. Add B. Subtract C. Multiply (by non-zero) D. Divide (by non-zero) E. All of the above

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?