Answer:
x = 64
Step-by-step explanation:
The sum of the interior angles of a quadrilateral = 360°
Sum the given angles and equate to 360
x + 2x + 114 + x - 10 = 360, that is
4x + 104 = 360 ( subtract 104 from both sides )
4x = 256 ( divide both sides by 4 )
x = 64
