If you were to make both x's equivalent, you'd have to multiply the first equation by 2 to get rid of the coefficient, 1/2. However, you'd have to multiply 2 onto -8 as well, therefore the equation would turn into x - 16 = 18. That is not equivalent to x - 8 = 18.
        
             
        
        
        
Answer 4 
4multiplyed by 4 is 16
        
             
        
        
        
Answer:
134 hamburgers sold on Sunday
Step-by-step explanation:
x+3x=536
4x=536
4x/4=x, 536/4=134
x=134
 
        
             
        
        
        
Answer:
13
Step-by-step explanation:
13 right? all ya gotta do is add em together right?
 
        
             
        
        
        
Answer:
There's supposed to be nothing in the 7 and 8 columns
Step-by-step explanation:
You were good, but there aren't any in the 7 or 8 columns, making 9 an outlier. 
hope this helps:)