can someone help me with this?

Answer:
30°
Explanation:
∠LMP + ∠PMN = 180°
[∠LMO + ∠OMP] + [∠PMR + ∠RMN] = 180°
FIND x
(x - 10) + (x + 30) + x + 40 = 180
3x - 10 + 30 + 40 = 180
3x + 60 = 180
3x = 120
x =40
FIND ∠LMO
∠LMO = x - 10
∠LMO = (40) - 10
∠LMO = 30°
Hope this helps and God bless!
Answer:
∠LMO = 30°
Step-by-step explanation:
Angles on a straight line add up to 180°
⇒ (x - 10)° + (x + 30)° + 40° + x° = 180°
⇒ x° + x° + x° - 10° + 30° + 40° = 180°
⇒ 3x° + 60° = 180°
⇒ 3x° = 120°
⇒ x = 40
Substitute found value of x into the expression for ∠LMO:
⇒ ∠LMO = (40 - 10)°
⇒ ∠LMO = 30°