Jose has a comic book collection that he keeps among 5 shelves with an equal number on each shelf. His father adds 20 comic books to the bottom shelf, so the shelf now has 125 books. How many total books are in his collection? Use algebra to solve the equation.(1 point)

105 and 120 will not work so plz get me the correct answer

1 answer

Let's assume that the number of comic books on each shelf before his father added 20 books is x.
Since there are 5 shelves with an equal number of comic books, the total number of books on those shelves is 5x.
After his father added 20 books, the number of books on the bottom shelf is x + 20.
The total number of books in the collection is now (5x - x) + 20 = 125.
Combining like terms, we get 4x + 20 = 125.
Subtracting 20 from both sides, we get 4x = 105.
Dividing both sides by 4, we get x = 26.25.
Since x represents the number of books on each shelf, which should be a whole number, this solution is not valid.
There is no whole number solution to this equation, so it seems there may be an error in the problem statement or the solution options.