SOLUTION: URGENT QUESTION the question is- papreback books cost$5 and hard cover books cost $7 each. I spend exactly $86 on books of these two types. Whta is the maximum number of books

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Question 209225: URGENT QUESTION
the question is-
papreback books cost$5 and hard cover books cost $7 each. I spend exactly $86 on books of these two types. Whta is the maximum number of books i can buy?
thanks. heaps
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
try to maximize the number of less expensive books

5 goes into 86, 17 times with a remainder of 1

increasing the remainder in steps of 5, you need the smallest remainder divisible by 7 ___ like 21

5 * 13 = 65 and 7 * 3 = 21 ___ so 16 books