In the given figure the value of angle 'x' is _____.

Here the missing angle other than angle x is a supplementary angle

 

Since the adjoining angle is a right angle, the missing angle is 90 degrees.

In the given figure, sum of angles of quadrilateral = 360 degrees

60+70+x+90 = 360

x = 360-220 = 140

The correct answer is Option (3) → 140°