Answer:
The answer is
![m=-20](https://img.qammunity.org/2020/formulas/mathematics/high-school/4okiul7ws551p1bsyxul45plaloewppucn.png)
Explanation:
In order to determine the answer, we have to know about solving equations.
When we have to solve an equation of one variable, first we have to add similar terms. A term is just a variable with a coefficient. Similar terms have the same variable.
In this case, we have two terms:
- "m" variable.
- just a number.
Then we have to solve the variable "m". We have to free it in one side.
Adding similar terms:
![7m-4-9m-36=0\\-2m-40=0\\-2m=40\\m=-(40)/(2)\\ \\m=-20](https://img.qammunity.org/2020/formulas/mathematics/college/g9oi33bhhb32vy8xjj2pr8gssqgrqhig9e.png)
Finally, the answer is
![m=-20](https://img.qammunity.org/2020/formulas/mathematics/high-school/4okiul7ws551p1bsyxul45plaloewppucn.png)