Pls can someone help me‼️‼️‼️‼️
and I don’t want files.

Answer:
135
Step-by-step explanation:
a line always has a degree of 180 so u just subtract 45 from 180 and get 135
m ∠LNM = 135°
Step-by-step explanation:
45° + 3x = 180°
3x = 180° - 45°
3x = 135°