Here is a list of errata in Practical Algebra: A Self-Teaching Guide (3rd edition) by Bobson Wong, Larisa Bukalov, and Steve Slavin. To report an error, fill out the form at http://bobsonwong.com/contact.
p. 246 (noted by Nicole Myers)
Example 8.16 should read Calculate (9x3 − 49x + 40) ÷ (3x + 8), not Calculate (9x3 − 49x + 40) ÷ (3x + 4).