Question

Jamie has saved $42 of her allowance money to buy books. If she buys 5 books at d dollars per book, she will have 42-5d of her allowance left. How much does she have left if the books cost $3.50 each?

Answer 1

How much money are the books? That is not a complete question

Answer 2

Cost of 1 book= $3.50
so cost of 5 books = 3.50*5
=$17.50 or 5d=$17.50
Money left = 42-5d
=42-17.50
=$32.50