Cameron collects old books, and they convinced their friend Kenji to start collecting as well.
Every month, they go to the store together, and they each buy a book. This table shows how
many books they each have:
1
2
3
4
Kenji
1
2
3
4
Cameron 12 13 14 15
Month
They both want an equation they can use to find how many books Cameron will have (c) when
Kenji has k books.
Complete their equation.
C=?
