Theres about 800 different combinations, i'm not sure though, i'm sorry if i'm wrong
Step-by-step explanation:
A straight line adds up to 180°
m+3m=180°
4m=180°
m=45°
3m=45°
angle CBD=3(45)
=135°
4+4+6+6=12+8=20
hope this helps
The answer is <span><span>−<span>6<span>x2</span></span></span>+<span>7x</span></span>−<span>212</span>