Answer:
Not really.
Step-by-step explanation:
3a
The angles x and 4x form a straight angle (=180 degrees).
so x+4x=180 => 5x=180 => x=180/5 = 36
The angles are therefore 36 and 4*36=144 degrees
3b
Similar to 3a, x-20 and x form a straight angle (=180 degrees)
so x-20 + x = 180 => 2x-20 = 180 => 2x = 180+20 = 200 => x = 200/2 = 100
So the two angles are
x-20 = 100-20 = 80 degrees
x = 100 degrees
