Answer:
2,29
Step-by-step explanation:
17,56 = 29,01 - 5x
5x = 29,01 - 17,56
5x = 11,45|:5
x = 2,29
 
        
                    
             
        
        
        
X^1/2 or x to the 1/2 power
        
             
        
        
        
60 min = 1 hour
1st we need to know how many times 20 goes in 60 so we will divide.
60 ÷ 20 = 3
Now we will multiply to find the trains speed in miles per hour. 
3 × 25 = 75
SO, the train travels 75 miles per hour. 
Hope I helped ya!!