subtract 5 from both sides. -1.6r=-5 divide both sides by-1.6. r=-5/-1.6 simp;ify-5/1.6 to 3.125. r =3.125 
 
        
                    
             
        
        
        
4x +9
3x and x are like terms
And 2 and 7 are like terms 
Hope this helps :D
        
             
        
        
        
It would come out to be $41.8275, so if you round it would cost $41.83.
        
             
        
        
        
$15 is the original purchase. $12 and hour. 
15+12y