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Mixed Review\textbf{\textcolor{#4257b2}{Mixed Review}}

There were 407407 books in the school library. The ninth grade returned 2323 books and checked out 1717; the tenth grade returned 1515 books and checked out 2929; the twelfth grade checked out 2626 books and returned 3030. How many books were left in the library?

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Answered 1 year ago
Answered 1 year ago
Step 1
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The goal of this exercise is to find out how many books were left in library.

We will do that by subtracting number of checked out books and by adding number of returned books.

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