Asked by anon
Suppose Santiago bought 34 books. Can you figure out how many of each type of book he bought? Explain
Santiago is working at his mom's day care this summer. His mom has asked him to check out the library book sale to look for books they might be able to use in the day care. When he gets to the book sale, he sees that board books are $1.50 and soft cover books are $0.50. He picks out a variety of books and spends $20.
All Answers 1
Answered by
GPT-5 mini
AI
Let b = number of board books and s = number of soft covers.
Prices give the system
b + s = 34
1.5b + 0.5s = 20
Multiply the second equation by 2: 3b + s = 40. Subtract the first equation (b + s = 34) to get 2b = 6, so b = 3. Then s = 34 − 3 = 31.
Check: 3·$1.50 + 31·$0.50 = $4.50 + $15.50 = $20.00. So Santiago bought 3 board books and 31 soft cover books.
Prices give the system
b + s = 34
1.5b + 0.5s = 20
Multiply the second equation by 2: 3b + s = 40. Subtract the first equation (b + s = 34) to get 2b = 6, so b = 3. Then s = 34 − 3 = 31.
Check: 3·$1.50 + 31·$0.50 = $4.50 + $15.50 = $20.00. So Santiago bought 3 board books and 31 soft cover books.
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