Sorry this answer is unacceptable
Vertical angles are congruent (equal), and the angles below are vertical angles.
x + 40 = 3x
40 = 3x - x
2x = 40
<u><em>x = 20</em></u>
-\frac{22}{3}=-7.33333 <span>Steps<span>$-\frac{22}{3}$</span></span>
Answer:
3
Step-by-step explanation:
As triangle ABC is an isosceles triangle, 5x+7=22:
