Answer:
x = 374/7
Step-by-step explanation:
all of the angles should equal to 360 degrees since it's a quadrilateral.
So,
1+ (2x+10)+(3x-5)+(2x-20) = 360
1+ 2x+10 +3x-5+2x-20 = 360
7x -14 =360
7x = 360+14
7x = 374
x= 374/7
x= 53.428...
Hope this helps!
Please mark brainliest if you think I helped! Would really appreciate!
