If Jose has n books, Lynn has n+4 books
when Lynn gives Jose 6 books her total number of books changes by -6 so it becomes: n+4-6 = n-2
Jose gains 6 books so his total becomes: n+6
We can minus Jose's books from Lyn's books total to get the difference: (n+6)-(n-2) = n -n +6 --2 = 8
Therefore Jose has 8 more books than Lynn.
