Segment MB is the angle bisector of angle AMC in this image.
Which is the value of x?
A. 25
B. 18
C. 20
D. 10
Choice D
Because Segment MB is an angle bisect angle CMB and angle AMB are congruent. So you do this:
x + 25 = 3x + 5
- 5 - 5
x + 20 = 3x
- x - x
20 = 2x
/ 2 /2
10 = x
+1982 
