Answer:
![=-17](https://img.qammunity.org/2020/formulas/mathematics/middle-school/flh0qx3bq3d9inh05miraygwpqq6dh06eh.png)
Explanation:
The first thing you must remember is the mulplication of signs. You know that:
![(+)(+)=+\\(-)(-)=+\\(-)(+)=-\\(+)(-)=-](https://img.qammunity.org/2020/formulas/mathematics/middle-school/r76df95ankxjidecek21t2m1fzsoe41xde.png)
You can observe that the number inside the parentheses is positive (+) and the sign that is outside the parentheses is negative (-), therefore, when you multiply these signs you get a negative sign (-). Then you get:
![-6-(11)=-6-11](https://img.qammunity.org/2020/formulas/mathematics/middle-school/m9xkvxop9rmpmrh6w3f68teem16mbac4mf.png)
Now, you need to add these numbers. And the result obtained is:
![=-17](https://img.qammunity.org/2020/formulas/mathematics/middle-school/flh0qx3bq3d9inh05miraygwpqq6dh06eh.png)