Answer:
159
Step-by-step explanation:
35x-1 =-35 plus 34x20
 
        
             
        
        
        
Write the equations: 

Substitute for h: 

Solve for s:

There were 280 downloads of the standard version. There were 1120 downloads of the high-quality version.
 
        
        
        
Alexander has to miles to go because if one mile is a third you can simply maltiply by three, then subtract the mile he already went. you maltiply by three because it was a third of the way there