Answer:
Step-by-step explanation:
(4x+39.5)° + (2y+20)° = 180°
4x + 2y = 120.5°
2x + y = 60.25° Eq. 1
Determine the expressions for the interior angles of the pentagon (see attached).
Total of interior angles of a pentagon = 540°
686.5° - 2x - 6y = 540°
2x + 6y = 146.5° Eq. 2
Subtract Eq.1 from Eq.2:
5y = 86.25°
y = 17.25°
2x + 17.25 = 60.25
x = 21.5°
