After this step:
1. 8+x=7 multiply both sides by -1
2. x=-7-8 move the constants to the right
3.x=-7-8 Calculate
4. x=-15
Answer:
yes
Step-by-step explanation:
118+107+63=287
360 is the total interior angle of a circle
so 360-287 = 73
Answer:
![x=-2,y=3](https://tex.z-dn.net/?f=x%3D-2%2Cy%3D3)
Step-by-step explanation:
The given system of equations is
![2x+4y=8](https://tex.z-dn.net/?f=2x%2B4y%3D8)
and
![6x+3y=-3](https://tex.z-dn.net/?f=6x%2B3y%3D-3)
The augmented matrix is
![\left[\begin{array}{ccc}2&4&|8\\6&3&|-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%264%26%7C8%5C%5C6%263%26%7C-3%5Cend%7Barray%7D%5Cright%5D)
![\frac{1}{2}R_1\to R_1](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7DR_1%5Cto%20R_1)
![\left[\begin{array}{ccc}1&2&|4\\6&3&|-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%26%7C4%5C%5C6%263%26%7C-3%5Cend%7Barray%7D%5Cright%5D)
![-6R_1+R_2\to R_2](https://tex.z-dn.net/?f=-6R_1%2BR_2%5Cto%20R_2)
![\left[\begin{array}{ccc}1&2&|4\\0&-9&|-27\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%26%7C4%5C%5C0%26-9%26%7C-27%5Cend%7Barray%7D%5Cright%5D)
![-\frac{1}{9}R_2\to R_2](https://tex.z-dn.net/?f=-%5Cfrac%7B1%7D%7B9%7DR_2%5Cto%20R_2)
![\left[\begin{array}{ccc}1&2&|4\\0&1&|3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%262%26%7C4%5C%5C0%261%26%7C3%5Cend%7Barray%7D%5Cright%5D)
![-2R_2+R_1\to R_1](https://tex.z-dn.net/?f=-2R_2%2BR_1%5Cto%20R_1)
![\left[\begin{array}{ccc}1&0&|-2\\0&1&|3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%260%26%7C-2%5C%5C0%261%26%7C3%5Cend%7Barray%7D%5Cright%5D)
Hence ![x=-2,y=3](https://tex.z-dn.net/?f=x%3D-2%2Cy%3D3)