Please help! - Kim needs to place 32 mystery books and 56 biography books on library shelves. She is to place the maximum number
of books on each shelf so that all the shelves have the same number of books. Each shelf will contain only one type of book. (Questions are in the picture, sorry for spelling mistakes)
2 answers:
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Let g be the number of grandchildren, and d be the number of dogs. They both have only one head, so the number of heads is
Grandchildren have 2 legs, while dogs have 4. So, the total number of legs is
From the first equation (the one for the heads) we can derive
Substitute this into the second to get
So, there are 9 dogs and (from the first equation