The expression is a bit invalid. You can't add variables by variables. 
        
             
        
        
        
Answer:

Step-by-step explanation:

 
        
                    
             
        
        
        
Answer:
The answer is 15 units.
Step-by-step explanation:
The reason it is 15 units is because  We know that QV = 15 and TQ = TS, QV = SV;4 x - 1 = 154 x = 15 + 14 x = 16x = 16 : 4 = 4 henceforth the answer being 15 units 
 
        
                    
             
        
        
        
Just subtract to find the difference.
75 - (-25) = 75 + 25 = 100.
It is 100 degrees hotter in florida than alaska.