Answer:
x = 25
Step-by-step explanation:
From the given picture,
In ΔMLN,
m∠NML + m∠MLN + ∠LNM = 180°
61° + 39° + m∠LNM = 180°
100° + m∠LNM = 180°
m∠LNM = 180° - 100°
m∠LNM = 80°
If JK║MN and JN is a transverse intersecting these parallel lines at N and J,
∠LNM ≅ ∠LJK [Alternate interior angles]
(3x + 5)° = 80°
3x = 80 - 5
3x = 75
x = 25
