3(2)-18=-12 
6-18 = -12
-12 = -12
        
             
        
        
        
A, C, D, F? Not sure but took a good guess
        
                    
             
        
        
        
To solve this, create an equation that follows 45% of a value is 18. This would look like x*.45=18. Now, solve for x, x*.45=18, divide by .45, x=18/.45=40, making your value 40. To check, plug in your value to the equation 40*.45=18 and see if it stays true.
        
             
        
        
        
The first one would be the right one!
  
you just take all the y one side and the numbers on one side 
 so 8y+4= 6+3y
now 8y-3y= 6-4
therefore 5y = 2 
 
!!
        
                    
             
        
        
        
This is a diffficult question was there a chart