This is a problem book for junior high school students in their first and second years of mathematics, with a wealth of problems and explanations. * Problem book for 1st and 2nd year junior high school students (algebra) * Textbook used in advanced schools and cram schools * No writing inside * Includes answers and explanations (the cover is slightly torn at the bottom) I purchased this from the publisher, but I am selling it because I did not use it. No claims and no returns accepted.