The question is not shown all the way therefore i cannot answers
        
             
        
        
        
No no. no no n on o n in o n o b o n
        
             
        
        
        
Answer:
6
Step-by-step explanation:
base + 2(legs) = 56  (2 legs are the same because it's isosceles)
x + 2(5x - 5) = 56
x + 10x - 10 = 56
11x -10 = 56
11x = 66
x = 6