Answer:
22
Explanation:
A = x
B = 4x
C = 90
D = 60
The sum of the interior angles in a quadrilateral is 360, so:
A + B + C + D = 360
x + 4x + 90 + 60 = 360
5x + 150 = 360
5x = 360 - 150
5x = 210
x = 42
