First Let we solve the Original system of equations: 
 equation (1): 
 equation (2): 
Multiplying equation (1) by 7, we get 
 
 
Subtracting,
  implies
 implies 
Then 
 
Thus the solution of the original equation is
Now Let we form the new equation: 
Equation 2 is kept unchanged: 
 Equation (2):
Equation 1 is replaced with the sum of equation 1 and a multiple of equation 2: 
 Equation (1): 
Now solve this two equations: 
Multiply (1) by 7 and (2) by 8, 
 
 
 Subtracting, implies
 implies 
Then x=2. 
so the solution for the new system of equation is x=2, y=1. 
This Show that the solution to the system of equations 8x − 5y = 11 and 7x − 8y = 6 is the same as the solution to the given system of equations
 
 
 
 
 
        
                    
             
        
        
        
Answer:
30 and 15 finding the TWO that equal it in the problem?
Step-by-step explanation:
 
        
                    
             
        
        
        
-7(sqrt(11)+sqrt(5))/6
Mark brainliest please 
Hope this helps
        
                    
             
        
        
        
Answer:
71/8
8.875
8 7/8
Step-by-step explanation:
 
        
             
        
        
        
Laim descended 5,050.25 feet and his elevation changed by -5,050.25.