Answer:
The vertical angles theorum states that any angles that are opposite one another like the one in this picture are congrurent and equal.
Therefore x+17=3x-23
All we need to do now is solve for x
x+17=3x-23
17=2x-23
40=2x
20=x
x=20
Therefore...
X=20
x+17=37
and
3x-23=37
Step-by-step explanation:
