Answer: Yes, The relation is a function, they are the exact opposite.
Step-by-step explanation:
 
        
                    
             
        
        
        
2y=10x-14
5x-y=7
Divide both sides by 2 in the 1st equation
y=5x-7
Now substitute is to 2nd equation 
5x-5x+7=7
0=0
Therefore there is no solution or it is inconsistent 
        
                    
             
        
        
        
Answer:
4:5
Step-by-step explanation:
You can divide two to each number.
8 divided by 2 equals 4.
10 divided by 2 equals 5.
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
We start by adding  to both sides, giving
 to both sides, giving  , which after simplifying gives
, which after simplifying gives  .
.
We then add  to both sides, giving
 to both sides, giving  , which after simplifying gives
, which after simplifying gives  .
.
We can then divide both sides by  , giving
, giving  , which after simplifying gives
, which after simplifying gives  , or
, or  . So, x is 5.
. So, x is 5.