Răspuns:
Okay, let's solve this step-by-step:
1. Initially, there were two stacks of notebooks, with the second stack having 4 times more notebooks than the first stack.
2. After adding 8 notebooks to the first stack and removing 13 notebooks from the second stack, the number of notebooks in both stacks became equal.
Let's denote the initial number of notebooks in the first stack as x.
Then, the initial number of notebooks in the second stack would be 4x.
After the changes:
- First stack: x + 8
- Second stack: 4x - 13
Since the number of notebooks in both stacks became equal, we can write the equation:
x + 8 = 4x - 13
3x = 21
x = 7
So, the initial number of notebooks in the first stack was 7.
Now, to find the difference between the number of notebooks in the two stacks:
Second stack: 4x = 4 * 7 = 28
First stack: x = 7
The difference is 28 - 7 = 21 notebooks.
Therefore, the number of notebooks in the first stack is 21 less than the number of notebooks in the second stack.
