Question

Help with how to do this angle problem

Answer 1

75

Explanation:

180-105=75

Answer 2

122

Explanation:

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