Question

Judy has 15 books in her library. She bought several books at a thrift storeon Saturday. She now has 84 books in her library. How many books did shebuy at the thrift store? Write an equation to solve the problem use b forthe variable.

Answer 1

69 books

15+ b= 84

Explanation:

Answer 2

Let b the number of books Judy has bought.

The given data can be expressed as,

`15+b=84`