Answer:
75
Step-by-step explanation:
180-105=75
122
Angles of a quadrilateral add up to 360 then let the angle with x be y
So
119+78+105+y=360
302+y=360
y=360-302
y=58
Now
x+y=180 (angles on a straight line)
x+58=180
x=180-58
x=122
