Solve for y by setting one equation =to X after that you can substitute the equation into the other one let's set the first one in X= FORM
X-7y=10
-2x+14y=-20
Add 7y to both sides of the first equation to let x stand alone
X=7y+10
Now you can substitute x on the second equation 
-2 (7y+10)+14y=-20
Distribute 
-14y-20+14y=-20
Add and simplify 
Us cancel out =0 
-20=-20
0=0
They are the same equations you can also divide the second equation by -2 which would make it look like this
X-7y=10
-2 (x-7y=10) 
Let me know if I have answered your question
        
             
        
        
        
The answer is -8 I believe.
To put this into an equation, we get 7x-x=-48. This is equal to 6x=-48. When we divide we get -8.
        
                    
             
        
        
        
Answer:
4 × 6
Step-by-step explanation:
2^2= 4 or 2 × 2= 4
2^3= 6 or 2 × 2 × 2= 6 
So, 4 × 6 
 
        
             
        
        
        
Assuming you are solving for x...
 
        
        
        
Negative 3143 over 1000 divide -3.143 by 1000 and there’s your answer