Answer:
ab=bc because b devide ac in two equal sizes
ac=ab+bc
ac=2×ab
ac =2×bc
lets substitute ac and bc there we are given
x+3=2(3x-1)
x+3=6x-2
-5x/-5=-5/-5
x=1
ab=3(1)-1
ab=2
I forgot how to do this in middle school_
Vertical angles are equal, which is similar to saying "vertical angles are congruent." Note: vertical, not verticle.
