Answer:
The angle C is supplementary to the angle of 180°
180°-116°=64°
The sum of all sides of a triangle is always 180 °:
2x+4°+3x-13°+64°= 180°
5x+55°= 180°
5x=180°-55°
5x=125°
x=125°/5
x=25°
⇒A=3x-13°
A=3×25°-13°
A=75°-13°
A=62°
Answer C
hope this helps.