Answer
x = 32 units
Step-by-step explanation
The right angle indicates that the sum of angles that make up that region is 90°
So,
(Angle DBE) + (Angle CBE) = 90°
0.2x - 31° + 0.3x - 43° = 90°
0.5x - 74° = 90°
0.5x = 90° - 74°
0.5x = 16
Divide both sides by 0.5x
(0.5x/0.5x) = (16/0.50)
x = 32 units
Hope this Helps!!!