Answer:
[tex]65s = 390[/tex]
Step-by-step explanation:
Given
[tex]Books = 390[/tex]
[tex]Shelf = 65[/tex]
Required
Write an expression for the scenario
1 shelf can hold 65 books.
s shelves can hold 65s books.
So:
[tex]s\ shelves - 390[/tex]
Substitute 390 for s shelf
[tex]65s = 390[/tex]