For this case we have that by definition, the property of the neutral element in the sum of whole numbers establishes that:
![a + 0 = a](https://img.qammunity.org/2020/formulas/mathematics/college/d6bzpbtb0i4b0vytjnx9tsx9847108t5mx.png)
Where:
a: It is an integer
0: It is the neutral element
Then, if we have:
![n + 0 = 7\\n = 7](https://img.qammunity.org/2020/formulas/mathematics/college/fypfk0npb676fruyyb4t986cgpkycvr736.png)
The equation is not altered
Answer:
The property of the neutral element is mentioned