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The image you uploaded contains a mathematical problem written in Persian (Farsi). I'll extract the text and translate it, followed by solving the problem.

### Translated Text:
1. **Part 1:** "The atomic number \( X \) is 40. For \( X \), the sum of protons and electrons is 76."
   
2. **Part 2:** "If the sum of the electrons, protons, and neutrons of this atom is 87, calculate the number of neutrons and electrons for atom \( X \)."

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### Solution:
Given:
- Atomic number \( X = 40 \).
- The atomic number gives the number of protons, so the atom has 40 protons.
- The sum of protons and electrons is given as 76. Since the number of electrons equals the number of protons in a neutral atom, the number of electrons is also 40.

So, the sum of protons and electrons is:
\[
40 \, \text{(protons)} + 40 \, \text{(electrons)} = 80
\]
However, the question says that the sum is 76. This suggests the atom might be an ion, meaning it has lost or gained some electrons.

To balance this:
\[
40 \, \text{(protons)} + \text{number of electrons} = 76
\]
Thus, the number of electrons is:
\[
\text{number of electrons} = 76 - 40 = 36
\]
So, the atom has 36 electrons.

Now, we move to the second part, which gives the sum of protons, electrons, and neutrons as 87:
\[
40 \, \text{(protons)} + 36 \, \text{(electrons)} + \text{neutrons} = 87
\]
Thus, the number of neutrons is:
\[
\text{neutrons} = 87 - (40 + 36) = 87 - 76 = 11
\]

### Final Answer:
- **Number of electrons** = 36
- **Number of neutrons** = 11

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Would you like any further details or clarifications on this?

Here are some questions that could extend this information:
1. How is atomic number related to the number of protons in an atom?
2. What is the significance of electrons being fewer than protons?
3. How do you calculate the number of neutrons from atomic mass and atomic number?
4. What are ions and how do they form?
5. What would happen if the number of neutrons changed?

**Tip:** When calculating properties of atoms, always remember that the number of protons (atomic number) is the defining feature of an element.

The atomic number X is 40. For X, the sum of protons and electrons is 76. If the sum of electrons, protons, and neutrons of this atom is 87, calculate the number of neutrons and electrons for atom X.

Learn how to calculate the number of neutrons and electrons in an atom with atomic number 40. The problem covers essential concepts such as atomic number, protons, electrons, and neutrons, making it suitable for high school chemistry students.

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