For 2(s-5) = 2(s+5), it’s supposed to be:
2s-10 = 2s+10 (this is where it went wrong)
2s-20 = 2s
20 = 4s
5 = s

Two Angles and the side between them are equal to corresponding Angles and side of another triangle ( one of the Angles are equal because of vertical opposite angle pair ), so the required congruency criteria to prove them equal is :
400/20
20m/s
..............................
Answer:

Step-by-step explanation:
