Find the solution of this system of equations. separate the x- and y-values with a comma. x= 2 + y 3x – 7y= 10

Hello : 
x= 2 + y (1)
3x – 7y= 10 (2)
subsct in (2) : 
3(2+y) -7y = 10
6+3y -7y = 10
-4y = 4
y=-1
x = 2-1 = 1 
the solution of this system of equations is (1 , -1)

What are the answer choices?

The difference is 5,100m?