Answer:
![-30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/e6g0wgdgkmoy54i6ulx7sqmcqk057upwie.png)
Explanation:
We have to evaluate
.
To evaluate this, we first need to solve the part inside the bracket.
Here,
.
So, the expression becomes
![9/ 3[12-22]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/xqacuyw11km508c6fb285ri2sd6qtpvcpf.png)
Again we need to solve the part inside the bracket
Here,
![12-22=-10](https://img.qammunity.org/2020/formulas/mathematics/middle-school/bho9p6mdclsxigniaj0b8ni40afympf5j6.png)
So, the expression becomes
![9/ 3* -10](https://img.qammunity.org/2020/formulas/mathematics/middle-school/yjw27i0ecg2l0jpr4re6xp9rb9h2imnp7x.png)
Now, we need to divide the two numbers 9 and 3 before multiplying
the expression becomes
![3*-10](https://img.qammunity.org/2020/formulas/mathematics/middle-school/e9nm9pdyzkmb7awm6drpu4luahxf031vtg.png)
Finally
![3*-10=-30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1jjo5dg3objy0r2fqna74x2u2jujf6blb4.png)
Therefore, on evaluating the expression we get
.