Question

Judy has 15 books in her library. She bought some books at a thrift store on Saturday. She now has 85 books in her library. How many books did she buy at the thrift store? Write and solve an equation using a variable for each word problem.

Answer 1

She bought 70 books at the thrift store.

15+x=85

Answer 2

Judy bought 70 books at the thrift store.

Explanation:

I got 70 by adding 15+70=a and a= 85