Answer:
y=4
Step-by-step explanation:
I'm a little rusty at this but y=4 should be the correct answer. 
Hope this helps!
 
        
                    
             
        
        
        
Answer:
B will be the answer...
Step-by-step explanation:
The second equation in system B is only in terms of y, so we need to use elimination to eliminate the x term from the second equation in system A.
To do that, we need to multiply the first equation by 5.
5 (-x − 2y = 7)
-5x − 10y = 35
Add to the second equation.  Notice the x terms cancel out.
(-5x − 10y) + (5x − 6y) = 35 + (-3)
-16y = 32
Combining this new equation with the first equation from system A will get us system B.
-x − 2y = 7
-16y = 32
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
 
        
                    
             
        
        
        
Answer:
John received 10% of the overall votes.
Step-by-step explanation:
Let us assume that the number of votes John got  = m 
So, the number of votes Vivienne received =   3 times (John's share )
  = 3  times m   =  3 m
Also, The number of Votes Nassim received = 2 times ( Vivienne's share) 
2 x (3 m)   = 6 m
Total Votes in the grade 6  
= Votes received by { John + Vivienne + Nassim}
= m + (3 m) + (6 m) = 10 m
Hence, the total number of students who voted in grade 6  = 10 m

= 
or, The percentage of John's Votes  = 10%
Hence, John received 10% of the overall votes.