A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of this kind of equation is given by:
![Ax+By=C](https://img.qammunity.org/2023/formulas/mathematics/high-school/75j0pzqy8f6gtpgzjampxw030qc85p0hp7.png)
For the equation:
![y-x+wz=5](https://img.qammunity.org/2023/formulas/mathematics/college/kr24jt9u639v7xzc9mepumdvponcqzsz6z.png)
We can conclude is not a linear equation since there is a product between two variables.