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 books does he have in total? use algebra to solve the question
try again
Apologies for the mistake. Let's try again.
Let's assume that the initial number of comic books on each shelf is x.
Since there are 5 shelves, the total number of comic books on all the shelves is 5 * x.
After his father adds 20 comic books to the bottom shelf, the total number of comic books on the bottom shelf is x + 20.
The problem states that the total number of comic books after the addition is 125.
So the equation becomes:
5 * x + (x + 20) = 125
Simplifying the equation, we get:
6x + 20 = 125
6x = 125 - 20
6x = 105
Dividing both sides of the equation by 6, we get:
x = 105 / 6
x = 17.5
Since we can't have 17.5 comic books on a shelf, this means that our assumption is incorrect.
Let's try another assumption:
Let's assume that the initial number of comic books on each shelf is y.
Since there are 5 shelves, the total number of comic books on all the shelves is 5 * y.
After his father adds 20 comic books to the bottom shelf, the total number of comic books on the bottom shelf is y + 20.
The problem states that the total number of comic books after the addition is 125.
So the equation becomes:
5 * y + (y + 20) = 125
Simplifying the equation, we get:
6y + 20 = 125
6y = 125 - 20
6y = 105
Dividing both sides of the equation by 6, we get:
y = 105 / 6
y = 17.5
Again, we can't have 17.5 comic books on a shelf, this assumption is also incorrect.
It seems there is no solution to this problem, as we cannot find a whole number that satisfies the equation.
How many books in total
I apologize for the confusion. Let's approach the problem differently.
Let's assume that the initial number of comic books on each shelf is x.
Since there are 5 shelves, the total number of comic books on all the shelves is 5*x.
After his father adds 20 comic books to the bottom shelf, the total number of comic books on the bottom shelf is x + 20.
The problem states that the total number of comic books after the addition is 125.
So the equation becomes:
5*x + (x + 20) = 125
Simplifying the equation, we get:
6*x + 20 = 125
6*x = 125 - 20
6*x = 105
Dividing both sides of the equation by 6, we get:
x = 105 / 6
x = 17.5
Since we can't have 17.5 books on a shelf, it means that our initial assumption was incorrect.
Let's assume that the initial number of comic books on each shelf is y (a whole number).
Since there are 5 shelves, the total number of comic books on all the shelves is 5*y.
After his father adds 20 comic books to the bottom shelf, the total number of comic books on the bottom shelf is y + 20.
The problem states that the total number of comic books after the addition is 125.
So the equation becomes:
5*y + (y + 20) = 125
Simplifying the equation, we get:
6*y + 20 = 125
6*y = 125 - 20
6*y = 105
Dividing both sides of the equation by 6, we get:
y = 105 / 6
y = 17.5
Since we can't have 17.5 books on a shelf, this assumption is also incorrect.
It seems I made a mistake again. I apologize for the confusion. Let's approach this problem using a different method.
Let's assume that the initial number of comic books on each shelf is n (a whole number).
Since there is an equal number of books on each shelf, we can say that the number of comic books on the bottom shelf, after his father adds 20 books, is n + 20.
The total number of comic books on all the shelves, including the bottom shelf, is then: 5n + (n + 20).
The problem states that the total number of comic books after his father's addition is 125. So we can write the equation:
5n + (n + 20) = 125
Simplifying the equation, we get:
5n + n + 20 = 125
6n + 20 = 125
6n = 125 - 20
6n = 105
Dividing both sides of the equation by 6, we get:
n = 105 / 6
n = 17.5
Since n = 17.5, which implies having a non-whole number of comic books on each shelf, it means that my assumption was incorrect.
Therefore, it seems that there is no solution to this problem, as we cannot find a whole number of comic books on each shelf that satisfies the given conditions.
Let's break down the information given in the problem:
Let the number of comic books on each shelf (before his father adds 20 books) be represented by x.
According to the problem, there are 5 shelves with an equal number of comic books on each shelf, so the total number of comic books before his father adds 20 books can be calculated as 5x.
After his father adds 20 comic books to the bottom shelf, that shelf now has 125 comic books in total.
We can represent this as an equation: 5x + 20 = 125.
To solve for x, we can subtract 20 from both sides of the equation: 5x = 125 - 20.
Simplifying, we have 5x = 105.
Finally, to find the value of x, we divide both sides of the equation by 5: x = 105/5.
Calculating, x = 21.
Therefore, Jose had 21 comic books on each of the 5 shelves before his father added 20 books, which means he had a total of 5 * 21 = 105 comic books.
To solve this problem using algebra, we can set up an equation that represents the information given. Let's denote the number of comic books on each shelf as 'x'.
We know that there are 5 shelves with an equal number of books, so the total number of comic books on the shelves is 5x.
Jose's father then adds 20 comic books to the bottom shelf, making it a total of 125 comic books on that shelf. Therefore, the equation becomes:
5x + 20 = 125
To find the number of books in total, we need to solve for x. Let's do that:
Subtract 20 from both sides of the equation:
5x + 20 - 20 = 125 - 20
5x = 105
Divide both sides of the equation by 5:
5x/5 = 105/5
x = 21
So, Jose originally had 21 comic books on each shelf. To find the total number of books, we multiply the number of books on a single shelf by the number of shelves:
Total number of books = 21 * 5 = 105
Therefore, Jose has a total of 105 comic books in his collection.
Let's solve the problem, step by step:
Let's assume that the initial number of comic books on each shelf is x.
Since there are 5 shelves, the total number of comic books on all the shelves is 5 * x.
His father adds 20 comic books to the bottom shelf, so now the total number of comic books on the bottom shelf is x + 20.
The problem states that the total number of comic books after the addition is 125.
So the equation becomes:
5 * x + (x + 20) = 125
Simplifying the equation, we get:
6x + 20 = 125
6x = 125 - 20
6x = 105
Dividing both sides of the equation by 6, we get:
x = 105 / 6
x = 17.5
Since we can't have 17.5 comic books on a shelf, this means that our initial assumption was incorrect.
Let's try another assumption:
Let's assume that the initial number of comic books on each shelf is y.
Since there are 5 shelves, the total number of comic books on all the shelves is 5 * y.
His father adds 20 comic books, so now the total number of comic books on the bottom shelf is y + 20.
The problem states that the total number of comic books after the addition is 125.
So the equation becomes:
5 * y + (y + 20) = 125
Simplifying the equation, we get:
6y + 20 = 125
6y = 125 - 20
6y = 105
Dividing both sides of the equation by 6, we get:
y = 105 / 6
y = 17.5
Since we can't have 17.5 comic books on a shelf, this assumption is also incorrect.
This means that there is no solution to this problem, as we cannot find a whole number that satisfies the equation.