Answer:
-21.5
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
10.5
Step-by-step explanation:
 
        
             
        
        
        
Eliminationg these equations gives zero ,no solution
        
             
        
        
        
Answer:
You cannot solve for x on any of these. it will just be the same answer.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
-8z-8
Step-by-step explanation:
well add the 3z with -5z and will be -8z
and 2 and 6 add both and get 8