Answer:
![-3x-6=-9](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q8sq3e8gwewqg88bhh8p2rpqjldsuj6ri0.png)
Explanation:
The proccedure shown in the problem is applied to solve for x and calculate its value.
One of the equations shown in the problem is:
![-3x-6=-9](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q8sq3e8gwewqg88bhh8p2rpqjldsuj6ri0.png)
To solve for x you must_
- Add 6 to both sides of the equations:
![-3x-6+6=-9+6](https://img.qammunity.org/2020/formulas/mathematics/middle-school/iu8byvisbvzqgrjgg76qlkfcnzk0koq5tz.png)
![-3x=-3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/uwx3tt480omlfy5o1146wqpbwdv863qqcj.png)
- Then you must divide by -3:
![(-3x)/(-3)=(-3)/(-3) \\x=1](https://img.qammunity.org/2020/formulas/mathematics/middle-school/d2j1ccfd2fiwi5s4tw4u2z6cxq04imsey0.png)
Then the answer is:
![-3x-6=-9](https://img.qammunity.org/2020/formulas/mathematics/middle-school/q8sq3e8gwewqg88bhh8p2rpqjldsuj6ri0.png)