Except there are values you want to substitute into the expression, this is what your answer looks like:
 
 
        
        
        
Your multiplying by -4 each time
-1x-4=4
4x-4=-16
-16x-4=64
 
        
             
        
        
        
Answer:
9-63x
Step-by-step explanation:
9(1-7x)
9-63x
 
        
                    
             
        
        
        
Step-by-step explanation:
do you that is responsible for that another is probability