Well 12x5 is 60 and 8x5 is 40 then add them and it would be 100 altogether that would be B
        
                    
             
        
        
        
<span>5+x+(−2)=−8
5 + x - 2 = -8
x + 3 = -8
x = -11</span>
        
                    
             
        
        
        
She made the mistake in step 4
She should have divided by -2 not just 2 alone
        
             
        
        
        
Answer:
a
Step-by-step explanation:
inverse ----> y = x
x = 2y - 7
2y = x + 7 
y = (x+7)/2
 
        
             
        
        
        
Step-by-step explanation:
Divided by zero is undefined. Hence B is the answer.