Question

Norwood Middle School spends $17 on each workbook in addition to a one-time shipping cost of $21. If the school recently spent $157 on a shipment of workbooks, how many workbooks did it buy?

Answer 1

You would make it into an equation then solve it after creating that equation. When you hear the word "each" that should give you a clue or a sense that should be a variable. So in this case it would be:
17x+21=157
Then you would solve it from there. Once you find x you'll know how many workbooks Norwood Middle School purchased.