What is the solution to the pair of equation x + y equals 4 and -x+y equals 2

 x+y=4
-x+y=2

We solved this equations system by reduction method:
 x+y=4
-x+y=2

   2y=6    ⇒y=6/2=3

  x+y=4
-(-x+y=2)

     2x=2    ⇒x=2/2=1

x=1; y=3

substitution method
 x+y=4
-x+y=2

x=4-y
-(4-y)+y=2
-4+2y=2
2y=2+4
2y=6
y=6/2=3; then x=4-y=4-3=1

x=1; y =3

equalization method
 x+y=4  ⇒y=4-x
-x+y=2  ⇒y=2+x

Therefore:
4-x=2+x
-x-x=2-4
-2x=-2
x=-2/-2=1;  then; y=4-x=4-1=3

x=1; y=3.

Ithink the answer is last one.