What is the value of x below? *
A diagram with line m parallel to line n is shown.
![What is the value of x below A diagram with line m parallel to line n is shown class=](https://us-static.z-dn.net/files/d27/6dc2fba947fb2780b59518fab461c20b.png)
Answer:
Step-by-step explanation:
The sum of those two angles must be 180 degrees.
3x+10+80=180
3x+90=180
3x=90
x=30