If you would like to solve y = x - 4 and 2 * x + y = 5, you can do this using the following steps:
y = x - 4
2 * x + y = 5
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2 * x + (x - 4) = 5
2 * x + x = 5 + 4
3 * x = 9     /3
x = 9 / 3 
x = 3
y = x - 4 = 3 - 4 = -1
The correct result would be x = 3 and y = -1.
        
                    
             
        
        
        
Answer:
(-INFINITY , -2) (3 , INFINITY)
Function is positive when above the x axis 
Function is below the x axis between -2 and 3 
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
 
        
             
        
        
        
Answer: -7
Step-by-step explanation: