So let's start out by labeling Ethan as X
Since 85 is 1/3 of what Ethan drove, that means Ethan drove 3 times of 85.
85= (3x) -21                                 
85 -21 = 3x
60=3x
20 = x 
        
                    
             
        
        
        
24+8 = 30
30 - 12 = 18
18-9 = 8
There are 8 cards left in the stack
        
                    
             
        
        
        
Answer:
4
Step-by-step explanation:
because i know how to do it
 
        
                    
             
        
        
        
Answer: i would say 60 cm sorry if im wrong i think your missing a number
Step-by-step explanation: