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A student borrowed 5 books in the library on Monday, returned 3 books on Wednesday, and borrowed another 5 books on Friday. How many books does the student have?

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Mlcparra16id
Whenever he borrows a book the number is positive while when he returns it the number is negative.
During the days the number of books he gave/returned:
Monday: 5
Wednesday: -3
Friday: 5

We add the values:
[tex]5+(-3)+5=5-3+5=2+5=7[/tex]

Therefore the student has 7 books