Let's say that y is the unknown
180=2x+3+5x+1+y
180=7x+4+y
180-7x-4=y
176-7x=y=third angle
9 or 12 I think Possibly 18
I think so I’m not pretty sure
There's no way to tell if we can't see the inequality.
Given:
The figure of a pentagon.
To find:
The value of the x.
Solution:
We know that, the sum of all interior angles of a pentagon is 540 degrees. So,
![(5x-25)+(6x+25)+(6x-3)+(9x)+(7x+15)=540](https://tex.z-dn.net/?f=%285x-25%29%2B%286x%2B25%29%2B%286x-3%29%2B%289x%29%2B%287x%2B15%29%3D540)
![(5x+6x+6x+9x+7x)+(-25+25-3+15)=540](https://tex.z-dn.net/?f=%285x%2B6x%2B6x%2B9x%2B7x%29%2B%28-25%2B25-3%2B15%29%3D540)
![33x+12=540](https://tex.z-dn.net/?f=33x%2B12%3D540)
Subtract both sides by 12.
![33x+12-12=540-12](https://tex.z-dn.net/?f=33x%2B12-12%3D540-12)
![33x=528](https://tex.z-dn.net/?f=33x%3D528)
Divide both sides by 33.
![x=\dfrac{528}{33}](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7B528%7D%7B33%7D)
![x=16](https://tex.z-dn.net/?f=x%3D16)
Therefore, the value of the x is 16.