its just the form of counting and not necessarily the different number
The first one is b=75the second one is c= 15Hope this helps!
Correct answer is the last one.
Since these angles clearly form a circle and a circle is 360 degrees,
120-x+2x+16+3x-72=64+4x=360. Subtracting 64 from both sides, we get
4x=296 and by dividing both sides by 4 we get x=74
