Answer:
x=28
Explanation:
1. 4x+3+2x+9=180, Imagine a half circle which is 180 degrees where the image is! if you add the 2 equations, you would get 180
2. Add like terms, 6x+12=180
3. 6x=168, then divide 168 by 6
4. x=28
sorry if this is a bad explanation!